oj.uz

Submission #408067

# Submission time Handle Problem Language Result Execution time Memory
408067 2021-05-19T05:51:15 Z juggernaut Duathlon (APIO18_duathlon) C++17
0 / 100
 101 ms 10480 KB 
#include<bits/stdc++.h>
using namespace std;
#define endl '\n'
typedef long long ll;
int n,m;
vector<int>g[100005];
ll ans;
bool circle;
bool vis[100005];
int sz;
void dfs(int v,int p){
	vis[v]=true;
	sz++;
	for(int to:g[v])if(to!=p){
		if(vis[to]){
			circle=true;
			continue;
		}
		dfs(to,v);
	}
}
int main(){
	scanf("%d%d",&n,&m);
	while(m--){
		int x,y;
		scanf("%d%d",&x,&y);
		g[x].push_back(y);
		g[y].push_back(x);
	}
	for(int i=1;i<=n;i++)if(!vis[i]){
		circle=false;
		sz=0;
		dfs(i,i);
		ll s=sz*1ll;
		if(circle)ans+=s*(s-1)*(s-2);
		else for(int i=1;i<=sz;i++)ans+=2ll*(i-1)*(1ll*(n-i));
	}
	printf("%lld",ans);
}

Compilation message

count_triplets.cpp: In function 'int main()':
count_triplets.cpp:23:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |  scanf("%d%d",&n,&m);
      |  ~~~~~^~~~~~~~~~~~~~
count_triplets.cpp:26:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |   scanf("%d%d",&x,&y);
      |   ~~~~~^~~~~~~~~~~~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 3 ms 2636 KB Output is correct
3 Correct 3 ms 2636 KB Output is correct
4 Correct 3 ms 2636 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Incorrect 3 ms 2636 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 3 ms 2636 KB Output is correct
3 Correct 3 ms 2636 KB Output is correct
4 Correct 3 ms 2636 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Incorrect 3 ms 2636 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #3
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 70 ms 10480 KB Output is correct
2 Correct 101 ms 10448 KB Output is correct
3 Incorrect 85 ms 8120 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 2672 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 76 ms 5928 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 2636 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 68 ms 6000 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 3 ms 2636 KB Output is correct
3 Correct 3 ms 2636 KB Output is correct
4 Correct 3 ms 2636 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Incorrect 3 ms 2636 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 3 ms 2636 KB Output is correct
3 Correct 3 ms 2636 KB Output is correct
4 Correct 3 ms 2636 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Incorrect 3 ms 2636 KB Output isn't correct
7 Halted 0 ms 0 KB -