QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#697559 | #9525. Welcome to Join the Online Meeting! | CangShuV# | AC ✓ | 174ms | 30000kb | C++23 | 2.5kb | 2024-11-01 14:49:04 | 2024-11-01 14:49:04 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const int N = 2E5 + 5;
const int M = 5E5 + 5;
int st[N];
vector<int> g[N];
void add(int f, int t) {
g[f].push_back(t);
g[t].push_back(f);
}
void clr(int n) {
n += 2;
for (int i = 0; i <= n; ++i) {
g[i].clear();
}
}
template <typename T = size_t> // T需为整型。
struct __DSU { // 以1为起始下标。
// data field:
vector<T> pa;
// public:
explicit __DSU(T size) : pa(size + 1) { iota(pa.begin(), pa.end(), 0); }
T __find(T x) { return pa[x] == x ? x : find(pa[x]); } // 朴素查找.
T find(T x) {
return pa[x] == x ? x : pa[x] = find(pa[x]);
} // 带路径压缩查找.
void merge(T x, T y) { pa[find(x)] = find(y); }
int query(T x, T y) { // 查询两元素是否在同一集合.
return (find(x) == find(y));
}
};
void solve() {
int n, m, k;
int it;
cin >> n >> m >> k;
for (int i = 1; i <= k; ++i) {
cin >> it;
st[it] = 1;
}
for (int i = 1; i <= m; ++i) {
int a, b;
cin >> a >> b;
add(a, b);
}
int r = 0;
__DSU<> dsu(n);
for (int i = 1; i <= n; ++i) {
if (!st[i]) {
r = i;
break;
}
}
if (!r) {
cout << "No\n";
return;
}
st[r] = 1;
vector<vector<int>> ans;
stack<int, vector<int>> stk;
stk.push(r);
while (stk.size()) {
auto r = stk.top();
stk.pop();
vector<int> res;
res.emplace_back(r);
for (auto &it : g[r]) {
if (!dsu.query(r, it)) {
res.emplace_back(it);
dsu.merge(r, it);
if (!st[it]) {
stk.push(it);
st[it] = 1;
}
}
}
if (res.size() != 1)
ans.emplace_back(res);
}
for (int i = 2; i <= n; ++i) {
if (!dsu.query(i, 1)) {
cout << "No\n";
return;
}
}
cout << "Yes\n";
cout << ans.size() << '\n';
for (auto &it : ans) {
cout << it[0] << ' ' << (int)it.size() - 1 << ' ';
for (int j = 1; j < it.size(); ++j) {
cout << it[j] << ' ';
}
cout << '\n';
}
return;
}
int main() {
cin.tie(nullptr)->sync_with_stdio(false);
int n = 1;
// cin >> n;
while (n--)
solve();
return 0;
}
这程序好像有点Bug,我给组数据试试?
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 1ms
memory: 3572kb
input:
4 5 2 3 4 1 2 1 3 2 3 3 4 2 4
output:
Yes 2 1 2 2 3 2 1 4
result:
ok ok
Test #2:
score: 0
Accepted
time: 0ms
memory: 5540kb
input:
4 5 3 2 4 3 1 2 1 3 2 3 3 4 2 4
output:
No
result:
ok ok
Test #3:
score: 0
Accepted
time: 1ms
memory: 3624kb
input:
4 6 2 3 4 1 3 1 4 2 3 2 4 1 2 3 4
output:
Yes 1 1 3 3 4 2
result:
ok ok
Test #4:
score: 0
Accepted
time: 1ms
memory: 3568kb
input:
6 6 0 1 2 2 3 3 1 4 5 5 6 6 4
output:
No
result:
ok ok
Test #5:
score: 0
Accepted
time: 95ms
memory: 30000kb
input:
200000 199999 2 142330 49798 49798 116486 116486 64386 64386 192793 192793 61212 61212 138489 138489 83788 83788 89573 89573 8596 8596 156548 156548 41800 41800 14478 14478 27908 27908 82806 82806 9353 9353 160166 160166 92308 92308 36265 36265 126943 126943 190578 190578 191148 191148 177381 177381...
output:
Yes 199998 1 2 95113 178679 178679 1 186222 186222 1 122914 122914 1 18533 18533 1 66240 66240 1 143831 143831 1 52965 52965 1 45501 45501 1 36293 36293 1 95051 95051 1 114707 114707 1 90623 90623 1 10911 10911 1 1942 1942 1 41382 41382 1 188734 188734 1 107093 107093 1 154956 1549...
result:
ok ok
Test #6:
score: 0
Accepted
time: 73ms
memory: 29188kb
input:
199999 199998 1 136702 159826 166341 166341 59559 59559 169672 169672 102084 102084 136269 136269 57057 57057 59116 59116 119963 119963 85663 85663 33942 33942 84604 84604 189395 189395 154906 154906 22175 22175 144902 144902 198523 198523 35993 35993 35690 35690 47504 47504 104458 104458 68253 6825...
output:
Yes 199997 1 2 172082 191801 191801 1 65736 65736 1 10794 10794 1 50503 50503 1 194943 194943 1 42759 42759 1 35447 35447 1 55027 55027 1 175222 175222 1 103541 103541 1 104528 104528 1 21620 21620 1 141581 141581 1 74591 74591 1 43436 43436 1 42438 42438 1 84592 84592 1 29722 2972...
result:
ok ok
Test #7:
score: 0
Accepted
time: 76ms
memory: 29464kb
input:
199998 199997 0 67665 130538 130538 101337 101337 73749 73749 138128 138128 1274 1274 108069 108069 50961 50961 7039 7039 109946 109946 170551 170551 193330 193330 113590 113590 92775 92775 2146 2146 43591 43591 125033 125033 75583 75583 173991 173991 46820 46820 3986 3986 163272 163272 91657 91657...
output:
Yes 199996 1 2 5661 102870 102870 1 182503 182503 1 106861 106861 1 147686 147686 1 106747 106747 1 182217 182217 1 124210 124210 1 72832 72832 1 107526 107526 1 187820 187820 1 28484 28484 1 57839 57839 1 78991 78991 1 150102 150102 1 184106 184106 1 64483 64483 1 135180 135180 1 4...
result:
ok ok
Test #8:
score: 0
Accepted
time: 46ms
memory: 28108kb
input:
199997 199996 1 158877 35837 79489 79489 72932 72932 14238 14238 73007 73007 66909 66909 49015 49015 129581 129581 138449 138449 94774 94774 189625 189625 23578 23578 31043 31043 146625 146625 161587 161587 136966 136966 184859 184859 27587 27587 155616 155616 72392 72392 195320 195320 75551 75551 1...
output:
No
result:
ok ok
Test #9:
score: 0
Accepted
time: 23ms
memory: 16644kb
input:
200000 199999 1 29111 29111 80079 29111 131587 29111 197066 29111 125194 29111 156736 50697 29111 29111 74382 113595 29111 29111 26046 29111 172868 178564 29111 174875 29111 93471 29111 88216 29111 29111 147893 29111 145746 29111 34038 146500 29111 67862 29111 29111 19222 29111 121535 29111 49102 29...
output:
No
result:
ok ok
Test #10:
score: 0
Accepted
time: 39ms
memory: 19788kb
input:
199999 199998 2 52512 104330 130511 66864 139434 66864 92884 66864 66864 185580 184115 66864 137395 66864 66864 43463 118395 66864 111697 66864 66864 133237 66864 112507 66864 140264 66864 10 66864 151082 155779 66864 107988 66864 148839 66864 66864 40909 172685 66864 66864 189374 180054 66864 49 66...
output:
Yes 2 1 1 66864 66864 199997 130511 139434 92884 185580 184115 137395 43463 118395 111697 133237 112507 140264 10 151082 155779 107988 148839 40909 172685 189374 180054 49 41830 19259 186287 41932 21357 66485 95229 126195 72801 154651 48615 111519 156500 156919 60203 11260 164641 168543 130264 3648...
result:
ok ok
Test #11:
score: 0
Accepted
time: 41ms
memory: 19928kb
input:
199998 199997 0 77056 67665 130538 77056 77056 101337 73749 77056 77056 138128 1274 77056 77056 108069 50961 77056 77056 7039 77056 109946 77056 170551 193330 77056 113590 77056 77056 92775 2146 77056 43591 77056 77056 125033 75583 77056 173991 77056 46820 77056 77056 3986 77056 163272 91657 77056 ...
output:
Yes 2 1 1 77056 77056 199996 67665 130538 101337 73749 138128 1274 108069 50961 7039 109946 170551 193330 113590 92775 2146 43591 125033 75583 173991 46820 3986 163272 91657 92212 191670 170218 149297 164182 6856 61891 95065 7257 47282 126716 84031 52189 32847 63118 134126 143246 30142 58215 3315 1...
result:
ok ok
Test #12:
score: 0
Accepted
time: 31ms
memory: 7900kb
input:
1000 499500 999 458 720 932 821 847 788 447 593 430 896 257 238 380 924 968 30 389 306 278 824 83 342 329 513 476 313 714 348 602 105 758 777 663 1000 20 756 546 256 123 340 69 244 772 625 390 557 911 272 496 127 409 436 845 574 958 921 24 17 770 630 851 147 178 976 77 181 230 723 974 345 501 683 24...
output:
Yes 1 987 999 516 5 990 603 581 613 664 339 669 702 571 159 399 397 347 481 43 709 916 191 33 517 178 751 897 868 687 155 993 78 378 865 108 677 382 158 937 496 4 541 398 367 237 825 364 518 679 578 199 566 180 894 275 273 305 805 933 524 30 576 707 437 38 513 762 56 349 785 186 461 15 44 991 366 42...
result:
ok ok
Test #13:
score: 0
Accepted
time: 36ms
memory: 9872kb
input:
1000 499000 765 622 257 281 601 593 967 704 173 609 700 782 592 356 595 431 307 933 886 213 478 8 832 877 606 335 253 420 631 345 179 961 437 238 641 513 997 192 483 152 951 580 331 401 122 155 814 228 633 372 918 346 464 3 992 416 953 650 668 971 899 76 575 880 85 194 541 26 348 93 815 554 64 850 5...
output:
Yes 1 1 999 241 545 810 270 530 700 627 859 966 303 686 152 368 666 964 283 944 100 968 45 489 508 37 188 581 111 547 621 96 934 548 937 962 265 71 240 776 825 569 593 423 203 475 758 854 402 781 926 171 142 772 862 896 413 933 353 559 647 979 889 907 872 988 117 258 449 801 6 715 606 144 981 295 39...
result:
ok ok
Test #14:
score: 0
Accepted
time: 29ms
memory: 7812kb
input:
999 300000 98 544 367 966 146 474 309 291 482 953 116 340 59 765 566 227 176 371 672 170 739 120 931 23 858 153 884 258 842 763 405 104 957 596 978 732 515 497 269 174 551 653 690 755 808 288 574 17 356 500 665 827 172 987 240 154 824 220 430 722 950 534 400 413 908 671 12 427 818 187 335 572 644 52...
output:
Yes 8 1 615 249 631 342 766 189 927 415 588 372 219 290 91 374 238 872 629 984 661 184 124 949 686 248 759 119 407 955 423 385 744 911 964 803 782 851 659 602 274 20 609 561 251 739 974 250 564 498 150 737 979 288 530 496 59 901 930 24 389 35 491 692 978 675 494 176 543 293 361 354 875 557 765 424 6...
result:
ok ok
Test #15:
score: 0
Accepted
time: 50ms
memory: 11672kb
input:
10000 500000 10000 1905 4872 6021 8458 3220 7251 6356 3194 996 2320 298 7850 3567 2244 4361 7462 8058 9852 3057 6409 2288 9712 8533 5380 7131 970 2261 134 1179 1665 7329 442 8996 8203 7168 5946 7893 8282 9474 2445 1762 4900 101 6631 4588 7670 7716 7010 6113 5654 5308 3451 130 3205 2959 4898 374 6178...
output:
No
result:
ok ok
Test #16:
score: 0
Accepted
time: 50ms
memory: 9692kb
input:
10000 500000 9998 5272 7519 3021 7043 2522 2940 9960 3860 7595 3760 8035 2085 572 234 8292 3636 9619 6749 884 6669 8536 570 9353 2803 160 6085 5838 2812 7764 8722 2431 8854 2183 2032 7731 5404 5516 1574 4864 1431 8527 5506 1012 5713 8665 26 976 6010 4888 5975 6993 3187 7227 8438 6812 5903 1738 6467 ...
output:
No
result:
ok ok
Test #17:
score: 0
Accepted
time: 54ms
memory: 11800kb
input:
10000 500000 1234 7096 8517 9305 874 7758 730 2653 6237 2494 4290 2280 892 9081 2308 6418 3258 1690 103 9850 6778 9724 1914 1561 1361 3776 160 1892 1394 7981 3050 6013 5452 8769 7341 3259 6011 8672 4500 1930 8758 5103 4509 2782 1354 1583 8663 1088 2156 3254 7150 3824 4768 8230 7533 3277 8910 8135 19...
output:
Yes 519 1 90 5604 7184 7931 9981 314 3431 932 5880 9791 838 2 638 5665 3581 9314 8182 1589 1141 6440 8827 1159 1387 8517 2574 4904 4691 7801 8614 6609 3547 5547 1601 7737 2032 5976 4989 4731 8751 9916 9782 849 6400 3536 2994 1944 9371 7082 1120 5352 8643 3872 9801 1398 2907 9043 7057 7460 1171 5089 ...
result:
ok ok
Test #18:
score: 0
Accepted
time: 54ms
memory: 9748kb
input:
10000 500000 0 6605 3715 1237 3040 3617 2124 4550 1766 8159 4808 7027 9779 7053 1803 3973 6790 8233 2873 7636 6894 6821 9714 8280 8440 261 6160 1279 3627 5816 9131 8167 1332 6763 3029 9605 4045 921 9926 6547 4760 3618 7832 5961 6497 1255 5646 5567 621 5732 2860 88 3501 3866 6046 7188 6203 3337 2873...
output:
Yes 503 1 87 9149 790 144 9762 1620 6871 9267 3931 3798 3356 1441 4625 3711 8818 9796 8872 1422 78 3397 9561 6880 3673 2071 523 3354 1593 4572 4487 1655 7755 5919 550 2947 9433 2025 5167 2349 178 8566 6613 270 6931 8936 7438 8073 2911 2090 5348 9948 1188 2478 3114 6877 4969 1658 4018 5265 4348 4995 ...
result:
ok ok
Test #19:
score: 0
Accepted
time: 83ms
memory: 10392kb
input:
20000 499999 321 13495 16729 10971 3389 7920 17768 11943 12054 6426 13331 6453 15959 6842 12610 18437 12930 4597 7386 8506 52 17373 2492 18849 19694 8432 12552 8663 4836 5370 3125 4323 15529 5916 14378 13756 15147 19826 7961 3188 4919 14256 5230 16288 13867 6039 13451 12861 9057 12645 19486 16719 19...
output:
Yes 1784 1 43 6778 19205 19173 1847 14743 9285 17949 5469 5938 7992 14575 500 16474 16277 7718 10509 14938 8838 10436 9628 3456 13730 1765 9706 18868 14953 17857 8967 16847 11174 4186 9492 9109 4273 2931 17399 16852 876 4956 10008 17187 15052 4189 4189 53 19036 18504 19513 15459 10326 13574 13334 1...
result:
ok ok
Test #20:
score: 0
Accepted
time: 74ms
memory: 10328kb
input:
20000 499998 456 17380 3548 17148 12088 15694 2886 15042 15060 4903 3288 13810 5360 7487 15472 1934 6496 19753 7795 9485 16913 17980 18738 18003 3795 5186 18128 15284 3276 16833 13161 6707 8941 947 5088 4974 13222 1790 14903 14837 4315 17583 12119 15871 6961 11561 3674 18427 2207 1556 19736 719 2326...
output:
Yes 1799 1 47 12128 3954 4434 10073 13850 13824 5610 19948 12691 2360 15479 19643 3098 12862 11853 10989 10422 15721 10505 7561 17591 9876 4248 16054 14168 1020 1957 18747 7893 11642 4456 19645 192 19150 16987 12903 1737 7273 15074 17354 14361 18687 5411 9057 4732 2555 516 516 52 9145 4809 17685 51...
result:
ok ok
Test #21:
score: 0
Accepted
time: 112ms
memory: 15984kb
input:
100000 500000 1235 3510 14575 57589 88714 29299 62839 6733 25039 17686 8112 24858 274 16916 83976 25181 57773 49758 65223 33663 47471 12200 8551 57927 21092 67375 77093 76589 91355 94075 17071 50791 43800 72672 54280 19504 106 10971 87577 40091 88380 81937 27327 24188 78489 92382 43581 8875 22402 41...
output:
No
result:
ok ok
Test #22:
score: 0
Accepted
time: 127ms
memory: 16012kb
input:
100000 500000 9 34008 13155 90342 28233 23089 86546 14071 6854 11360 3498 65486 65603 70184 14269 18649 79366 11163 66926 49216 4445 76420 50121 20493 2808 43301 18218 44910 92999 97448 13760 37138 15100 36649 34074 1879 72027 68411 54611 87760 1896 60316 43650 8286 34285 74403 21309 96104 49344 941...
output:
Yes 28519 1 16 16265 68436 24857 79038 68964 87768 95940 29798 916 49781 89926 16201 18785 34295 41733 66116 66116 11 63050 62060 31427 89293 32703 91525 95889 90423 74284 87396 71258 71258 16 78707 37378 55423 86019 93157 61967 8487 54513 95075 50487 68525 87500 37136 90521 51722 39732 39732 8 1...
result:
ok ok
Test #23:
score: 0
Accepted
time: 128ms
memory: 16008kb
input:
100000 500000 1 75076 9583 32552 72566 77581 74823 25463 58197 78380 62002 94563 99622 60434 39479 68180 1722 38894 43269 85989 33777 78513 5464 79304 57968 37134 88958 60066 61043 23394 50002 93317 59516 46962 55978 3705 2504 341 70466 21789 42193 45686 1370 18780 91444 2274 93546 66571 97443 53551...
output:
Yes 28605 1 9 79657 44766 34949 56506 87360 91223 76765 5016 49346 49346 8 63387 35012 38247 67843 12549 7133 82531 9474 9474 14 51868 36638 74548 34569 95745 53291 15269 68509 82766 94035 65795 54323 7003 44049 44049 21 8576 10516 71209 95481 23647 62381 68594 16170 39685 70910 36007 56612 73459...
result:
ok ok
Test #24:
score: 0
Accepted
time: 126ms
memory: 15908kb
input:
100000 500000 0 39862 49976 22596 40406 37185 98022 80733 93561 81387 94842 25064 61254 42694 16911 22623 87861 89266 37654 59510 12230 43457 79569 73883 19406 63275 92754 22177 11799 5763 44974 1570 83476 79123 73330 45165 77314 63415 32676 70388 8398 22032 77785 63620 61574 23429 41486 30923 1236...
output:
Yes 28596 1 5 63233 82701 27351 6935 2884 2884 7 44572 3443 2231 65018 71798 45252 22005 22005 8 82164 83851 49081 14047 94685 70006 79268 62509 62509 12 5672 58849 72554 52087 83552 89848 52139 91823 32216 44235 81295 94134 94134 11 76233 34315 90813 62755 76668 44149 78416 5517 22773 87508 570...
result:
ok ok
Test #25:
score: 0
Accepted
time: 70ms
memory: 23244kb
input:
199999 200000 10 162044 184301 102211 174303 129412 46215 153004 13679 113247 194319 100393 176945 52810 193834 159859 44467 119931 61763 196292 30856 21297 175055 20174 1882 11250 184866 74000 1054 74272 134956 41299 186242 162575 63218 119189 12678 29884 5001 148164 16567 24612 169902 77735 135002...
output:
No
result:
ok ok
Test #26:
score: 0
Accepted
time: 48ms
memory: 21616kb
input:
200000 199999 0 142790 145621 180161 104270 112230 88214 154000 63048 188285 141046 185739 50230 142683 197737 141276 49672 41219 95859 175530 171250 171226 174408 151297 88982 28928 71368 199034 63185 116370 106685 192890 167797 132366 79091 78160 89965 177169 151554 172583 127365 9032 60583 78786...
output:
No
result:
ok ok
Test #27:
score: 0
Accepted
time: 156ms
memory: 24460kb
input:
200000 500000 245 193722 185527 109052 75916 93935 24076 79627 20964 180786 120016 132778 186582 144529 16308 58727 114586 130490 34200 113593 7386 151039 39324 175706 195617 169880 139107 160903 183556 167931 124336 92216 181943 41472 98648 191217 191760 19769 86540 4125 65866 133876 106754 96372 1...
output:
No
result:
ok ok
Test #28:
score: 0
Accepted
time: 167ms
memory: 24424kb
input:
200000 500000 14 142703 65403 129451 151977 165363 20230 132897 87039 9024 158327 31353 194121 16577 146056 139648 187616 8050 35431 127655 35285 195736 80740 3874 174224 168938 136840 97592 176911 12210 58008 85816 66096 61709 179153 69540 1567 86595 14951 182066 29930 183615 37773 166329 61767 167...
output:
No
result:
ok ok
Test #29:
score: 0
Accepted
time: 174ms
memory: 24444kb
input:
200000 500000 1 5880 85775 146428 142622 151159 88421 138441 169300 66421 147351 32187 62008 74476 82579 109015 176101 15964 50525 172923 142682 150232 178015 197099 29910 154380 124900 65984 825 137825 194984 139256 31396 65802 141485 14608 126721 85235 193397 167129 98424 54611 63857 8244 68507 68...
output:
Yes 87143 1 4 190782 23882 198016 192998 192998 6 67687 117848 78985 58145 187586 40739 40739 4 98380 164176 112731 94446 94446 4 3029 56285 144484 127192 127192 4 25835 82165 127210 86740 86740 5 109113 33685 19198 82739 176972 176972 5 152852 65768 17485 56630 172112 172112 6 87919 123086 1...
result:
ok ok
Test #30:
score: 0
Accepted
time: 81ms
memory: 23292kb
input:
199999 199998 73589 144387 49530 75323 115971 116495 141238 92902 186288 75011 21274 196 62128 161581 112516 16226 166382 73692 120539 170346 127146 153896 57832 23870 56030 110186 132465 101619 681 13908 5901 194116 151154 160650 78720 87497 131676 94642 65227 153151 67720 61825 132140 114363 76085...
output:
Yes 126410 2 3 3 1 4 4 1 5 5 4 8 7 6 9 9 1 12 12 1 14 14 1 15 15 2 17 16 17 2 19 18 19 2 20 21 21 2 23 22 22 1 24 23 2 25 26 26 2 28 29 29 1 32 32 2 33 34 34 1 37 37 1 41 41 2 48 49 49 5 64 67 63 66 65 65 1 83 83 1 101 101 1 120 120 2 148 147 147 2 172 173 148 1 174 174 1 19...
result:
ok ok
Test #31:
score: 0
Accepted
time: 1ms
memory: 3668kb
input:
2 1 1 1 1 2
output:
Yes 1 2 1 1
result:
ok ok
Test #32:
score: 0
Accepted
time: 1ms
memory: 3560kb
input:
2 1 0 1 2
output:
Yes 1 1 1 2
result:
ok ok
Extra Test:
score: 0
Extra Test Passed