QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#722948 | #6969. 幻想乡战略游戏 | TheZone | 100 ✓ | 169ms | 25760kb | C++20 | 2.3kb | 2024-11-07 20:42:17 | 2024-11-07 20:42:18 |
Judging History
answer
#include <bits/stdc++.h>
#define ll long long
#define trvl(x,i,y) for(int i=ehd[x],y; y=to[i],i; i=lst[i])
#define ls (x<<1)
#define rs (x<<1|1)
using namespace std;
const int N=1e5+10;
int n,m;
int ehd[N],to[N<<1],len[N<<1],lst[N<<1];
int fa[N],siz[N],son[N],top[N],id[N],dfn[N];
ll S,T,dis[N];
void insert(int x,int y,int w) {
static int cnt=0;
to[++cnt]=y,len[cnt]=w,lst[cnt]=ehd[x],ehd[x]=cnt;
to[++cnt]=x,len[cnt]=w,lst[cnt]=ehd[y],ehd[y]=cnt;
}
void dfs1(int x,int p) {
fa[x]=p; siz[x]=1;
trvl(x,i,y) if(y!=p) {
dis[y]=dis[x]+len[i];
dfs1(y,x);siz[x]+=siz[y];
if(siz[y]>siz[son[x]]) son[x]=y;
}
}
void dfs2(int x,int t) {
static int cnt=0;
top[dfn[id[x]=++cnt]=x]=t;
if(son[x]) dfs2(son[x],t);
trvl(x,i,y) if(son[x]!=y&&fa[x]!=y) dfs2(y,y);
}
int tag[N<<2],mx[N<<2];
ll c[N<<2],s[N<<2];
void psd(int x) {
if(!tag[x]) return;
c[ls]+=s[ls]*tag[x],mx[ls]+=tag[x],tag[ls]+=tag[x];
c[rs]+=s[rs]*tag[x],mx[rs]+=tag[x],tag[rs]+=tag[x];
tag[x]=0;
}
void upd(int x) {
mx[x]=max(mx[ls],mx[rs]);
c[x]=c[ls]+c[rs];
}
void build(int x,int l,int r) {
if(l==r) {
s[x]=dis[dfn[l]]-dis[fa[dfn[l]]];
return;
}
int mid=(l+r)>>1;
build(ls,l,mid);
build(rs,mid+1,r);
s[x]=s[ls]+s[rs];
}
int find(int x,int l,int r) {
if(l==r) return dfn[l];
int mid=(l+r)>>1; psd(x);
if(mx[rs]*2>T) return find(rs,mid+1,r);
return find(ls,l,mid);
}
void mdf(int x,int l,int r,int L,int R,ll w) {
if(L<=l&&r<=R) {
c[x]+=s[x]*w,mx[x]+=w,tag[x]+=w;
return;
}
int mid=(l+r)>>1; psd(x);
if(L<=mid) mdf(ls,l,mid,L,R,w);
if(mid<R) mdf(rs,mid+1,r,L,R,w);
upd(x);
}
ll qry(int x,int l,int r,int L,int R) {
if(L<=l&&r<=R) return c[x];
int mid=(l+r)>>1; ll c=0; psd(x);
if(L<=mid) c+=qry(ls,l,mid,L,R);
if(mid<R) c+=qry(rs,mid+1,r,L,R);
return c;
}
void modify(int x,int w) {
for(; x; x=fa[top[x]]) mdf(1,1,n,id[top[x]],id[x],w);
}
ll query(int x,ll w=0) {
for(; x; x=fa[top[x]]) w+=qry(1,1,n,id[top[x]],id[x]);
return w;
}
int main() {
scanf("%d%d",&n,&m);
for(int x,y,w,i=n; --i; ) {
scanf("%d%d%d",&x,&y,&w);
insert(x,y,w);
}
dfs1(1,0);
dfs2(1,1);
build(1,1,n);
for(int x,w; m--; ) {
scanf("%d%d",&x,&w);
modify(x,w);
S+=dis[x]*w;
T+=w;
x=find(1,1,n);
printf("%lld\n",S+T*dis[x]-2*query(x));
}
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Pretests
Final Tests
Test #1:
score: 5
Accepted
time: 0ms
memory: 10508kb
input:
5000 2000 1 2 701 2 3 811 3 4 548 4 5 703 5 6 32 6 7 435 7 8 368 8 9 978 9 10 68 10 11 550 11 12 667 12 13 270 13 14 486 14 15 217 15 16 486 16 17 326 17 18 418 18 19 361 19 20 344 20 21 116 21 22 373 22 23 38 23 24 563 24 25 591 25 26 800 26 27 94 27 28 210 28 29 548 29 30 278 30 31 169 31 32 1000 ...
output:
0 374968 4576211 78541526 81407158 733359655 739404699 838213298 1065206845 1189431593 1475358020 1629991988 1743120427 1961812417 2287462078 2447622580 2543297822 2576127476 2808245908 2852868056 2857502227 2989584009 2994671229 3152458761 3235015261 3312146239 3665063055 3858145241 3938231115 3951...
result:
ok 2000 numbers
Test #2:
score: 5
Accepted
time: 0ms
memory: 12564kb
input:
5000 2000 1 2 576 2 3 745 3 4 672 4 5 812 5 6 770 6 7 261 7 8 191 8 9 534 9 10 209 10 11 576 11 12 184 12 13 212 13 14 996 14 15 466 15 16 360 16 17 127 17 18 180 18 19 804 19 20 74 20 21 504 21 22 912 22 23 253 23 24 113 24 25 418 25 26 723 26 27 596 27 28 92 28 29 845 29 30 215 30 31 96 31 32 224 ...
output:
0 73613694 170140746 179078334 292181448 320671932 559805316 565000766 968748170 1046415165 1095236507 1408798424 1434559333 1447063538 1447183079 1608177909 1664454034 2059658290 2127853227 2146078361 2146565603 2300717947 2308762347 2319215702 2366918634 2433191214 2742980794 2824719850 2946124350...
result:
ok 2000 numbers
Test #3:
score: 5
Accepted
time: 0ms
memory: 12372kb
input:
5000 2000 1 2 149 2 3 122 3 4 778 4 5 764 5 6 514 6 7 905 7 8 289 8 9 151 9 10 976 10 11 315 11 12 429 12 13 517 13 14 488 14 15 679 15 16 354 16 17 597 17 18 583 18 19 378 19 20 128 20 21 990 21 22 123 22 23 893 23 24 859 24 25 140 25 26 188 26 27 142 27 28 620 28 29 735 29 30 662 30 31 261 31 32 9...
output:
0 6320496 33522536 428473548 437840388 675964071 676487597 710721786 872521332 873371948 1028917316 1075544960 1099018670 1100251310 1565073127 1637098351 1969054465 2085992986 2091531280 2141596156 2144573878 2246681338 2358786877 2567264272 2584783924 2584857276 2597019034 2616119444 2653361360 26...
result:
ok 2000 numbers
Test #4:
score: 5
Accepted
time: 67ms
memory: 25760kb
input:
100000 100000 1 2 31 2 3 400 3 4 488 4 5 524 5 6 665 6 7 63 7 8 381 8 9 375 9 10 936 10 11 157 11 12 657 12 13 346 13 14 408 14 15 288 15 16 138 16 17 785 17 18 15 18 19 109 19 20 319 20 21 659 21 22 773 22 23 703 23 24 995 24 25 974 25 26 159 26 27 163 27 28 468 28 29 915 29 30 245 30 31 634 31 32 ...
output:
0 6131047858 21480683875 26198866115 34394354675 40395512345 51341331455 67874564019 71618614997 73055435654 77381239949 90674258871 95851989327 96579508327 100944938087 101903623262 112877152676 123463836842 124669913356 126059995783 127567705681 134029284017 136589942445 139878512179 157347017780 ...
result:
ok 100000 numbers
Test #5:
score: 5
Accepted
time: 76ms
memory: 25608kb
input:
100000 100000 1 2 460 2 3 195 3 4 548 4 5 573 5 6 835 6 7 147 7 8 107 8 9 619 9 10 881 10 11 982 11 12 185 12 13 152 13 14 98 14 15 153 15 16 14 16 17 925 17 18 651 18 19 226 19 20 175 20 21 968 21 22 25 22 23 695 23 24 597 24 25 353 25 26 803 26 27 958 27 28 598 28 29 535 29 30 330 30 31 743 31 32 ...
output:
0 5077861896 8054222536 18096689075 41026587445 43960280457 47822042679 51732411460 57034416906 59647968521 77907477870 89752477166 92790891606 93261400458 94775492180 107116707524 114049909926 134519030206 139405954054 142481321713 148593746231 155066572211 158513969639 165884458319 167177734797 17...
result:
ok 100000 numbers
Test #6:
score: 5
Accepted
time: 137ms
memory: 18012kb
input:
100000 100000 1 2 121 2 3 761 1 4 427 1 5 833 1 6 28 6 7 336 5 8 977 8 9 347 1 10 124 3 11 13 10 12 525 4 13 407 7 14 546 3 15 279 2 16 707 11 17 835 13 18 300 17 19 138 6 20 763 3 21 607 17 22 118 22 23 192 7 24 865 21 25 86 23 26 98 10 27 691 25 28 643 20 29 285 10 30 526 24 31 194 8 32 227 31 33 ...
output:
0 2941172 11343512 12924462 17855554 21198058 24537382 28404326 31235630 37238909 41457497 44153177 46367587 48542539 48979206 53792475 57142878 60713086 63117418 69318778 72151672 74564208 76224438 80214018 81348649 82938589 85545349 85600149 88350213 94639672 97551658 98692936 100619614 101454654 ...
result:
ok 100000 numbers
Test #7:
score: 5
Accepted
time: 83ms
memory: 19800kb
input:
100000 100000 1 2 76 1 3 842 1 4 532 1 5 416 2 6 353 3 7 770 4 8 416 5 9 241 6 10 682 7 11 639 8 12 302 9 13 785 10 14 784 11 15 607 12 16 889 13 17 792 14 18 891 15 19 663 16 20 88 17 21 854 18 22 681 19 23 95 20 24 81 21 25 175 22 26 329 23 27 558 24 28 422 25 29 850 26 30 919 27 31 674 28 32 474 ...
output:
0 186618787 6508155951 13472406803 16694918463 20520668211 21111265504 21595553324 29191369128 31065479106 37893580638 42766863995 43311506798 44675938098 45227927586 53320789257 53524963982 58935150002 60142944888 64659903596 65420584367 77280628303 77307909463 78481309735 83871278773 84128866873 8...
result:
ok 100000 numbers
Test #8:
score: 5
Accepted
time: 169ms
memory: 17980kb
input:
100000 100000 1 2 788 1 3 928 2 4 165 2 5 545 3 6 762 3 7 259 4 8 786 4 9 494 5 10 881 5 11 172 6 12 371 6 13 908 7 14 884 7 15 398 8 16 995 8 17 914 9 18 464 9 19 684 10 20 300 10 21 706 11 22 398 11 23 134 12 24 818 12 25 927 13 26 557 13 27 323 14 28 344 14 29 394 15 30 990 15 31 819 16 32 904 16...
output:
0 13759914 16740024 18992578 22378132 23867055 28122747 30335307 31749537 36290022 45900805 51670102 52846582 56682532 59579852 63392221 69141725 76492224 79540010 80805718 81557318 82453646 86256913 87664693 92106913 98535653 100697649 104040813 109689267 116355009 119615745 127498560 129757164 133...
result:
ok 100000 numbers
Test #9:
score: 5
Accepted
time: 89ms
memory: 20684kb
input:
100000 100000 1 2 494 2 3 30 3 4 81 4 5 890 5 6 547 6 7 811 7 8 245 8 9 175 9 10 126 10 11 871 11 12 826 12 13 705 13 14 527 14 15 360 15 16 447 16 17 800 17 18 794 18 19 340 19 20 789 20 21 335 21 22 873 22 23 826 23 24 770 24 25 537 25 26 591 26 27 523 27 28 455 28 29 599 29 30 912 30 31 789 31 32...
output:
0 1321281934 3273383378 3369180605 6324071000 11387753393 18745823952 22935591248 27194379359 31351270559 32494406246 33396381766 34072411474 37223527246 39099575574 41785497186 44803578260 45378947720 46497749960 48673492462 49086117362 49277813912 52073090561 52873514537 53524372531 57807707386 58...
result:
ok 100000 numbers
Test #10:
score: 5
Accepted
time: 91ms
memory: 20592kb
input:
100000 100000 1 2 386 2 3 954 3 4 980 4 5 584 5 6 346 6 7 854 7 8 763 8 9 824 9 10 909 10 11 174 11 12 635 12 13 498 13 14 578 14 15 468 15 16 248 16 17 739 17 18 175 18 19 531 19 20 93 20 21 939 21 22 795 22 23 250 23 24 54 24 25 124 25 26 273 26 27 758 27 28 597 28 29 279 29 30 149 30 31 869 31 32...
output:
0 78865957 4115127510 4379359961 8983360627 13939646129 14288398979 16468313958 18551100144 18959731752 19152610166 19234982666 24437334130 25261985129 31606394262 31834422949 32934548011 33722573553 34486298079 36943386891 38024794281 41257000979 45122113856 45507935256 45796378632 46923479232 5062...
result:
ok 100000 numbers
Test #11:
score: 5
Accepted
time: 94ms
memory: 20420kb
input:
100000 100000 1 2 126 2 3 500 3 4 234 4 5 710 5 6 254 6 7 818 7 8 959 8 9 242 9 10 768 10 11 479 11 12 5 12 13 453 13 14 774 14 15 371 15 16 170 16 17 685 17 18 202 18 19 992 19 20 647 20 21 307 21 22 925 22 23 410 23 24 328 24 25 153 25 26 807 26 27 719 27 28 590 28 29 812 29 30 515 30 31 778 31 32...
output:
0 1253969844 5229750118 5379380578 5858844028 12369873436 15741380112 20703898255 21673011216 21888820632 29724710966 30908563293 33953914115 38813000925 39351511105 41280319631 45326385903 45742182247 50306675747 53409974179 54971177879 55888596031 56270503656 57825436602 62338502796 64719388762 66...
result:
ok 100000 numbers
Test #12:
score: 5
Accepted
time: 87ms
memory: 20360kb
input:
100000 100000 1 2 949 2 3 876 3 4 748 4 5 477 5 6 381 6 7 771 7 8 32 8 9 235 9 10 81 10 11 184 11 12 358 12 13 786 13 14 421 14 15 673 15 16 841 16 17 184 17 18 556 18 19 350 19 20 930 20 21 584 21 22 882 22 23 109 23 24 189 24 25 160 25 26 883 26 27 817 27 28 234 28 29 150 29 30 817 30 31 254 31 32...
output:
0 304984820 2281997048 12466568768 12520108998 13691643380 17463343165 23693172719 28824977982 30744150598 30798434766 33989910996 34157359694 34584584023 42490477460 42522644090 45220861285 46393085186 46719896553 49203102708 53611547580 55200953764 57270254512 61305124842 65499790394 65588963192 6...
result:
ok 100000 numbers
Test #13:
score: 5
Accepted
time: 89ms
memory: 20532kb
input:
100000 100000 1 2 973 2 3 609 3 4 712 4 5 864 5 6 415 6 7 296 7 8 367 8 9 407 9 10 987 10 11 396 11 12 942 12 13 406 13 14 109 14 15 178 15 16 95 16 17 60 17 18 647 18 19 895 19 20 347 20 21 857 21 22 887 22 23 800 23 24 280 24 25 166 25 26 144 26 27 929 27 28 138 28 29 118 29 30 408 30 31 703 31 32...
output:
0 2986347540 3168201690 11550098457 17548666603 23394406928 24522512878 24832805302 25060287514 28288496431 29902415603 30524820361 33984834226 34469686213 35383551177 35560277981 36970218269 37027057790 37877833342 39302189290 42448698748 42592281586 42664488721 45674186895 50309066697 52399500796 ...
result:
ok 100000 numbers
Test #14:
score: 5
Accepted
time: 98ms
memory: 21044kb
input:
100000 100000 1 2 249 2 3 541 3 4 679 4 5 789 5 6 301 6 7 218 7 8 281 8 9 730 9 10 906 10 11 54 11 12 568 12 13 610 13 14 445 14 15 120 15 16 370 16 17 214 17 18 876 18 19 701 19 20 935 20 21 227 21 22 492 22 23 280 23 24 627 24 25 1 25 26 451 26 27 163 27 28 554 28 29 759 29 30 386 30 31 150 31 32 ...
output:
0 3238447212 8341633329 10887421952 11041128183 12087645024 15608366976 16211711102 19869737008 19871529761 21410538785 24425352635 29014974147 30571338229 30887324809 32643004552 32696537416 38084734902 41074320738 41295569207 48184220501 48491747205 56265076384 56411895040 57705667975 59114032770 ...
result:
ok 100000 numbers
Test #15:
score: 5
Accepted
time: 91ms
memory: 20260kb
input:
100000 100000 1 2 24 2 3 258 3 4 408 4 5 587 5 6 611 6 7 919 7 8 412 8 9 229 9 10 579 10 11 931 11 12 77 12 13 824 13 14 174 14 15 492 15 16 513 16 17 904 17 18 903 18 19 147 19 20 219 20 21 753 21 22 578 22 23 658 23 24 288 24 25 816 25 26 592 26 27 988 27 28 433 28 29 643 29 30 392 30 31 663 31 32...
output:
0 999307404 1411796346 1603694586 6113469852 7333919801 8392705536 9800537846 13730835380 21044686739 21295307609 22381625868 24878573683 25644235879 29575952505 29851450655 30120747035 33631386101 35395187700 36018281584 37921990816 38117465656 40615307650 46257835846 46845717930 48127516895 536712...
result:
ok 100000 numbers
Test #16:
score: 5
Accepted
time: 85ms
memory: 20156kb
input:
100000 100000 1 2 567 2 3 812 3 4 146 4 5 65 5 6 419 6 7 86 7 8 920 8 9 832 9 10 130 10 11 53 11 12 894 12 13 247 13 14 137 14 15 712 15 16 282 16 17 393 17 18 618 18 19 535 19 20 799 20 21 227 21 22 355 22 23 181 23 24 767 24 25 350 25 26 42 26 27 710 27 28 378 28 29 428 29 30 595 30 31 234 31 32 6...
output:
0 1462648668 1515454152 2088763980 4957302576 11099174256 14282625186 15337271768 17956353805 20408388089 21309235552 21992732392 22206647595 28381153838 32288113405 33929294980 34281946986 35962761883 38141565428 39842434169 44723361829 44763171173 46733530779 48585768831 49217086682 50465660032 52...
result:
ok 100000 numbers
Test #17:
score: 5
Accepted
time: 91ms
memory: 20520kb
input:
100000 100000 1 2 408 2 3 524 3 4 486 4 5 497 5 6 598 6 7 638 7 8 752 8 9 365 9 10 217 10 11 192 11 12 711 12 13 282 13 14 659 14 15 134 15 16 240 16 17 128 17 18 651 18 19 975 19 20 113 20 21 159 21 22 861 22 23 111 23 24 957 24 25 814 25 26 386 26 27 25 27 28 791 28 29 446 29 30 151 30 31 790 31 3...
output:
0 1263938820 7270345185 8128446765 10093042289 10093862721 12106182006 12832223553 12839281513 13778947690 14187644160 15365810058 15972085556 17533102878 21959546746 28062675233 34245349178 36071719124 40904074136 51015317169 52663559100 53989171140 57275537652 57962040362 62936713861 63057655661 6...
result:
ok 100000 numbers
Test #18:
score: 5
Accepted
time: 92ms
memory: 20620kb
input:
100000 100000 1 2 716 2 3 57 3 4 220 4 5 368 5 6 120 6 7 843 7 8 313 8 9 211 9 10 444 10 11 886 11 12 40 12 13 811 13 14 938 14 15 14 15 16 745 16 17 725 17 18 247 18 19 592 19 20 92 20 21 483 21 22 645 22 23 393 23 24 294 24 25 247 25 26 25 26 27 667 27 28 432 28 29 852 29 30 644 30 31 694 31 32 86...
output:
0 2198838135 2413557794 2570744805 4364595247 5336151391 9290260266 9739531088 10675484372 14545357290 14806687416 15728146769 16137699473 17234331308 21037825658 27084393640 30859507382 36542086813 37380421401 37466905866 37721979386 39053728616 40039727470 40923999574 42196787114 43358509643 46469...
result:
ok 100000 numbers
Test #19:
score: 5
Accepted
time: 88ms
memory: 20716kb
input:
100000 100000 1 2 405 2 3 375 3 4 830 4 5 199 5 6 993 6 7 711 7 8 797 8 9 864 9 10 402 10 11 809 11 12 852 12 13 250 13 14 5 14 15 268 15 16 403 16 17 63 17 18 589 18 19 502 19 20 568 20 21 663 21 22 922 22 23 605 23 24 824 24 25 585 25 26 169 26 27 951 27 28 65 28 29 116 29 30 71 30 31 561 31 32 31...
output:
0 2833279047 5339468667 6114151293 7888087483 11362555469 12046619353 14522326953 14544718923 15271452909 17580768093 17880598899 19060583814 19621031928 21583771464 26577362310 27698655041 34632601581 35112296563 40060831399 41369555289 41863084194 44353710894 46310575770 48113831260 48500230210 49...
result:
ok 100000 numbers
Test #20:
score: 5
Accepted
time: 83ms
memory: 20920kb
input:
100000 100000 1 2 246 2 3 34 3 4 21 4 5 38 5 6 476 6 7 769 7 8 511 8 9 127 9 10 165 10 11 71 11 12 638 12 13 416 13 14 29 14 15 681 15 16 594 16 17 708 17 18 560 18 19 948 19 20 433 20 21 773 21 22 963 22 23 302 23 24 194 24 25 676 25 26 414 26 27 229 27 28 790 28 29 474 29 30 517 30 31 279 31 32 53...
output:
0 1164404528 1245792644 1889518238 3428702738 5588795218 6252036268 7150173620 8899286165 9018353568 11536993048 11680853449 17650834973 19610253399 24375113989 25951200739 26836631233 27606157858 29875820476 35083388824 35602735934 37792882763 41040758805 43554414675 43559406712 50495783857 5100908...
result:
ok 100000 numbers