QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#107510 | #5423. Perfect Matching | qinsanma | WA | 338ms | 37924kb | C++14 | 2.1kb | 2023-05-21 18:41:28 | 2023-05-21 18:41:31 |
Judging History
answer
# include<bits/stdc++.h>
using namespace std;
typedef long long int ll;
ll b[1000000+10],lisan[1000000+10],l[1000000+10],r[1000000+10],a[1000000+10];
int book[1000000+10];
vector<pair<int,int>>v[1000000+10];
vector<int>ans;
int cnt;
map<int,int>mp;
void dfs(int now)
{
book[now]=1;
for(auto it:v[now])
{
if(book[it.first])
continue;
ans.push_back(it.second);
cnt++;
dfs(it.first);
}
}
int main ()
{
int t;
cin>>t;
while(t--)
{
int n;
scanf("%d",&n);
int len=0;
ans.clear();
mp.clear();
int tot=0;
for(int i=1; i<=n; i++)
{
scanf("%lld",&a[i]);
l[i]=a[i]+i;
r[i]=a[i]-i;
if(mp[l[i]])
{
l[i]=mp[l[i]];
}
else
{
tot++;
mp[l[i]]=tot;
l[i]=tot;
}
if(mp[r[i]])
{
r[i]=mp[r[i]];
}
else
{
tot++;
mp[r[i]]=tot;
r[i]=tot;
}
}
for(int i=1; i<=2*n; i++)
{
v[i].clear();
book[i]=0;
}
for(int i=1; i<=n; i++)
{
v[l[i]].push_back(make_pair(r[i],i));
v[r[i]].push_back(make_pair(l[i],i));
}
int flag=0;
for(int i=1; i<=2*n; i++)
{
cnt=0;
if(book[i])
continue;
dfs(i);
if(cnt%2==1)
{
flag=1;
break;
}
}
if(flag)
{
cout<<"No"<<'\n';
}
else
{
cout<<"Yes"<<'\n';
for(int i=0; i<ans.size(); i++)
{
cout<<ans[i]<<" "<<ans[i+1]<<'\n';
i++;
}
cout<<'\n';
}
}
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 4ms
memory: 27040kb
input:
3 6 14 22 33 11 25 36 4 100 10 98 12 4 1 3 5 7
output:
Yes 1 4 2 5 3 6 Yes 1 3 2 4 No
result:
ok 3 Cases (3 test cases)
Test #2:
score: -100
Wrong Answer
time: 338ms
memory: 37924kb
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 1 14 15 16 20 21 22 33 34 79 139 202 244 289 310 316 322 337 382 397 451 460 463 481 517 520 526 556 568 619 661 736 763 790 853 904 934 979 988 1090 1105 1162 1219 1273 1285 1294 1405 1411 1456 1459 1531 1555 1561 1588 1615 1618 1630 1651 1669 1684 1723 1738 1915 1972 2026 2029 2092 2155 2197 2...
result:
wrong answer abs(40-50) != abs(a[40]-a[50]) (test case 1)