QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#395342 | #5423. Perfect Matching | 2745518585 | AC ✓ | 440ms | 28980kb | C++20 | 1.8kb | 2024-04-21 13:27:31 | 2024-04-21 13:27:31 |
Judging History
answer
#include<cstdio>
#include<algorithm>
#include<vector>
using namespace std;
const int N=1000001;
int n,b[N],q1,q2,b1[N],b2[N];
bool g[N],h[N];
vector<pair<int,int>> a[N],ans;
bool dfs(int x,int fa)
{
h[x]=true;
vector<int> p;
for(auto i:a[x])
{
if(g[i.second]) continue;
g[i.second]=true;
if(h[i.first])
{
p.push_back(i.second);
continue;
}
if(dfs(i.first,i.second)) p.push_back(i.second);
}
bool u=true;
if(p.size()%2==1) u=false,p.push_back(fa);
for(int i=0;i<p.size();i+=2) ans.push_back(make_pair(p[i],p[i+1]));
return u;
}
int main()
{
int T;
scanf("%d",&T);
while(T--)
{
scanf("%d",&n);
q1=q2=0;
for(int i=1;i<=n;++i)
{
scanf("%d",&b[i]);
b1[++q1]=b[i]+i;
b2[++q2]=b[i]-i;
}
sort(b1+1,b1+q1+1);
q1=unique(b1+1,b1+q1+1)-b1-1;
sort(b2+1,b2+q2+1);
q2=unique(b2+1,b2+q2+1)-b2-1;
for(int i=1;i<=n;++i) g[i]=false;
for(int i=1;i<=q1+q2;++i) a[i].clear(),h[i]=false;
ans.clear();
for(int i=1;i<=n;++i)
{
int x=lower_bound(b1+1,b1+q1+1,b[i]+i)-b1,y=q1+lower_bound(b2+1,b2+q2+1,b[i]-i)-b2;
a[x].push_back(make_pair(y,i));
a[y].push_back(make_pair(x,i));
}
bool u=false;
for(int i=1;i<=q1+q2;++i)
{
if(!dfs(i,0))
{
u=true;
break;
}
}
if(u)
{
printf("No\n");
continue;
}
printf("Yes\n");
for(auto i:ans) printf("%d %d\n",i.first,i.second);
}
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 11988kb
input:
3 6 14 22 33 11 25 36 4 100 10 98 12 4 1 3 5 7
output:
Yes 1 4 5 2 6 3 Yes 4 2 1 3 No
result:
ok 3 Cases (3 test cases)
Test #2:
score: 0
Accepted
time: 245ms
memory: 23900kb
input:
10 100000 0 -1 -2 -3 -4 -5 -2 -7 -8 -9 -10 -9 -12 13 14 15 -16 -17 -18 19 20 19 -22 -21 -20 -25 -26 -27 -28 -27 -26 31 30 29 -34 -35 -34 39 38 37 42 41 42 47 44 45 46 49 48 -53 -52 -51 -56 -55 -54 55 56 57 -58 -59 -60 61 62 63 64 65 64 67 66 69 70 73 72 73 74 73 76 75 74 79 80 81 -84 -83 -84 89 86 8...
output:
Yes 77 78 137 138 200 201 242 244 287 289 308 309 314 315 320 321 335 337 380 382 395 396 449 450 458 459 461 462 479 480 515 517 518 520 524 526 554 556 566 567 617 619 659 660 734 736 761 763 788 790 851 853 902 903 932 933 977 978 986 987 1088 1089 1103 1104 1160 1162 1217 1218 1271 1273 1283 128...
result:
ok 10 Cases (10 test cases)
Test #3:
score: 0
Accepted
time: 0ms
memory: 12016kb
input:
10 100 28761184 28761185 28761186 28761187 28761188 28761189 28761190 28761191 -20675012 -20675013 -20675014 -20675015 -20675016 -20675017 -20675018 -20675019 -20675020 -20675021 -20675022 -20675023 -20675024 -20675025 -20675026 -20675027 -20675028 -20675029 -20675030 -20675031 -36758138 -36758139 -...
output:
Yes 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 39 29 30 31 32 33 34 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 59 60 61 62 63 64 65 66 67 68 36 37 38 35 2 3 4 5 6 7 8 1 69 70 71 72 73 74 Yes ...
result:
ok 10 Cases (10 test cases)
Test #4:
score: 0
Accepted
time: 202ms
memory: 28980kb
input:
10 100000 -40608960 -40608959 -40608958 -40608957 -40608956 -40608955 -40608954 -40608953 -40608952 -40608951 -40608950 -40608949 -40608948 -40608947 -40608946 -40608945 -40608944 -40608943 -40608942 -40608941 -40608940 -40608939 -40608938 -40608937 -40608936 -40608935 -40608934 -40608933 -40608932 ...
output:
Yes 29329 29330 29331 29332 29333 29334 29335 29336 29337 29338 29339 29340 29341 29342 29343 29344 29345 29346 29347 29348 29349 29350 29351 29352 71754 71755 71756 71757 71758 71759 71760 71761 71762 71763 71764 71765 71766 71767 71768 71769 71770 71771 71772 71773 71774 71775 71776 71777 71778 71...
result:
ok 10 Cases (10 test cases)
Test #5:
score: 0
Accepted
time: 440ms
memory: 26148kb
input:
10 100000 0 -1 -2 3 2 5 6 7 -2 1 0 9 12 11 -8 13 8 -7 16 17 -10 19 22 21 22 23 4 -15 -18 -17 -6 -31 -14 25 32 -25 26 27 -32 31 38 -31 -32 -19 -30 -35 46 45 -48 -37 48 41 46 -43 -44 53 56 55 50 -27 52 61 62 -33 -18 19 64 45 46 -57 -8 -25 -26 -11 -22 49 -66 -65 -66 29 78 -15 74 83 12 83 14 85 86 -7 -5...
output:
Yes 89504 28 8564 26518 63463 1121 36811 36817 8931 95315 96991 61541 81132 92548 41302 83637 34736 778 12537 4360 99552 2005 97953 92893 58176 30631 70597 19622 37677 26691 27149 66364 67617 10211 17075 44140 57643 11472 23176 35741 95323 12598 9050 10585 68565 28519 21782 10746 1793 47710 63141 55...
result:
ok 10 Cases (10 test cases)
Test #6:
score: 0
Accepted
time: 150ms
memory: 12480kb
input:
1000 1000 -2 0 3 4 6 7 4 7 6 9 11 9 10 12 16 13 16 17 18 20 19 19 24 22 25 23 28 25 26 27 30 32 31 34 36 37 34 37 37 40 42 43 44 45 43 44 46 45 50 48 51 49 54 55 52 55 54 57 56 61 60 61 64 65 64 67 65 66 67 68 71 73 73 75 76 77 78 75 76 78 82 79 80 81 83 83 87 88 90 89 90 93 92 93 95 94 96 96 100 97...
output:
No No No No No No Yes 23 22 34 33 48 47 73 72 108 107 128 127 148 147 156 155 180 179 193 192 211 210 261 260 263 262 310 309 319 318 343 342 405 404 407 406 418 417 444 443 456 455 503 502 584 583 600 599 664 663 700 699 705 704 719 718 721 720 728 727 740 739 771 770 858 857 913 912 952 951 963 96...
result:
ok 1000 Cases (1000 test cases)