Submission #264978

#	Time	Username	Problem	Language	Result	Execution time	Memory
264978		dsjong	Duathlon (APIO18_duathlon)	C++14	0 / 100	1084 ms	73064 KiB

count_triplets

#include <bits/stdc++.h>
using namespace std;
vector<int>cur;
bool g[12][12], vis[12];
int n, m;
set<pair<pair<int, int>, int>>ans;
void go(){
	for(int i=0;i<cur.size();i++){
		for(int j=i+1;j<cur.size()-1;j++){
			ans.insert({{cur[i], cur[j]}, cur.back()});
		}
	}
	if(cur.size()==n) return;
	for(int i=1;i<=n;i++){
		if(vis[i]) continue;
		if(!cur.empty() && !g[cur.back()][i]) continue;
		cur.push_back(i);
		vis[i]=true;
		go();
		cur.pop_back();
		vis[i]=false;
	}
}
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);
	cin>>n>>m;
	for(int i=1;i<=m;i++){
		int x, y;
		cin>>x>>y;
		g[x][y]=g[y][x]=true;
	}
	go();
	cout<<ans.size();
}

Compilation message (stderr)

count_triplets.cpp: In function 'void go()':
count_triplets.cpp:8:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 |  for(int i=0;i<cur.size();i++){
      |              ~^~~~~~~~~~~
count_triplets.cpp:9:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 |   for(int j=i+1;j<cur.size()-1;j++){
      |                 ~^~~~~~~~~~~~~
count_triplets.cpp:13:15: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   13 |  if(cur.size()==n) return;
      |     ~~~~~~~~~~^~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 11
• Subtask 3: 0 / 8
• Subtask 4: 0 / 10
• Subtask 5: 0 / 13
• Subtask 6: 0 / 15
• Subtask 7: 0 / 20
• Subtask 8: 0 / 8
• Subtask 9: 0 / 10