#include <bits/stdc++.h>
using namespace std;
#define X first
#define Y second
int n,sol;
map<pair<string,int>,int> m; //prefix, up/down, id
map<pair<string,string>,int> ob;
map<pair<string,int>,int> mf; //prefix, up/down, id
map<pair<string,string>,int> obf;
map<pair<string,string>,int> isti;
pair<string,string> Flip(string x, string y){
return {string()+y[0]+x[0], string()+y[1]+x[1]};
}
int main(){
cin >> n;
for(int i = 0;i<n;i++){
string a,b; cin >> a >> b;
sol+=m[{a,1}]+m[{b,0}]-ob[{b,a}];
m[{a,0}]++;
m[{b,1}]++;
ob[{a,b}]++;
a = Flip(a,b).X; b = Flip(a,b).Y;
sol+=mf[{a,1}]+mf[{b,0}]-obf[{b,a}];
mf[{a,0}]++;
mf[{b,1}]++;
obf[{a,b}]++;
sol-=isti[{a,b}];
isti[{a,b}]++;
}
cout << sol;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
292 KB |
Output is correct |
2 |
Correct |
0 ms |
292 KB |
Output is correct |
3 |
Incorrect |
0 ms |
332 KB |
Output isn't correct |
4 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
292 KB |
Output is correct |
2 |
Correct |
0 ms |
292 KB |
Output is correct |
3 |
Incorrect |
0 ms |
332 KB |
Output isn't correct |
4 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Execution timed out |
1079 ms |
39120 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
292 KB |
Output is correct |
2 |
Incorrect |
255 ms |
14348 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
292 KB |
Output is correct |
2 |
Correct |
0 ms |
292 KB |
Output is correct |
3 |
Correct |
0 ms |
292 KB |
Output is correct |
4 |
Incorrect |
0 ms |
332 KB |
Output isn't correct |
5 |
Halted |
0 ms |
0 KB |
- |