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Submission #859416

# Submission time Handle Problem Language Result Execution time Memory
859416 2023-10-10T06:15:15 Z iskhakkutbilim Graph (BOI20_graph) C++17
0 / 100
 3 ms 7768 KB 
#include <bits/stdc++.h>
using namespace std;

#define int long long
#define ff first
#define ss second
#define all(a) a.begin(), a.end()
const int N = 2e5;

int n, m;
vector< pair<int, long double> > g[N+10];
int used[N+10];
long double cost[N+10];
long double sum;
void dfs(int v){
	used[v] = 1;
	sum+= abs(cost[v]);
	for(auto [to, c] : g[v]){
		if(used[to] == 0){
			cost[to] = c - cost[v];
			dfs(to);
		}else{
			
		}
	}
}

main(){
   ios::sync_with_stdio(0);
   cin.tie(0); cout.tie(0);
   long double  ans;
	cin >> n >> m;
	for(int i = 0;i < m; i++){
		int a, b, c; cin >> a >> b >> c;
		g[a].push_back({b, (long double)c * 10.0});
		g[b].push_back({a, (long double)c * 10.0});
	}
	vector<long double> how(n + 1);
	int answer = 0;
	for(int start = -1000; start <= 1000; start++){
		for(int i = 1;i <= n; i++){
			for(int j = 1;j <= n; j++) used[j] = 0;
			sum = 0;
			cost[i] = start;
			dfs(i);
			int ok = 1;
			for(int v = 1; v <= n && ok; v++){
				for(auto [to, c] : g[v]){
					if(cost[v] + cost[to] != c){
						ok = 0;
						break;
					}
				}
			}
			if((!answer or ans > sum) && ok){
				ans = sum;
				answer = 1;
				for(int j = 1;j <= n; j++) how[j] = cost[j];
			}
		}
	}
	if(!answer){
		cout << "NO";
		return 0;
	}
	cout << "YES" << '\n';
//	cout << fixed << setprecision(6);
	for(int i = 1;i <= n; i++) cout << how[i] / 10 << ' ';
	return 0;
}

Compilation message

Graph.cpp:28:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   28 | main(){
      | ^~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 7768 KB answer = YES
2 Correct 2 ms 7516 KB answer = YES
3 Correct 2 ms 7516 KB answer = YES
4 Correct 2 ms 7516 KB answer = NO
5 Correct 2 ms 7516 KB answer = YES
6 Correct 2 ms 7516 KB answer = YES
7 Correct 2 ms 7516 KB answer = YES
8 Correct 3 ms 7516 KB answer = YES
9 Correct 2 ms 7516 KB answer = NO
10 Correct 2 ms 7516 KB answer = YES
11 Correct 2 ms 7516 KB answer = YES
12 Correct 2 ms 7516 KB answer = NO
13 Correct 2 ms 7516 KB answer = YES
14 Correct 2 ms 7620 KB answer = YES
15 Correct 2 ms 7516 KB answer = YES
16 Correct 2 ms 7516 KB answer = YES
17 Correct 2 ms 7516 KB answer = YES
18 Correct 2 ms 7512 KB answer = YES
19 Incorrect 2 ms 7516 KB jury has the better answer: jans = YES, pans = NO
20 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 7768 KB answer = YES
2 Correct 2 ms 7516 KB answer = YES
3 Correct 2 ms 7516 KB answer = YES
4 Correct 2 ms 7516 KB answer = NO
5 Correct 2 ms 7516 KB answer = YES
6 Correct 2 ms 7516 KB answer = YES
7 Correct 2 ms 7516 KB answer = YES
8 Correct 3 ms 7516 KB answer = YES
9 Correct 2 ms 7516 KB answer = NO
10 Correct 2 ms 7516 KB answer = YES
11 Correct 2 ms 7516 KB answer = YES
12 Correct 2 ms 7516 KB answer = NO
13 Correct 2 ms 7516 KB answer = YES
14 Correct 2 ms 7620 KB answer = YES
15 Correct 2 ms 7516 KB answer = YES
16 Correct 2 ms 7516 KB answer = YES
17 Correct 2 ms 7516 KB answer = YES
18 Correct 2 ms 7512 KB answer = YES
19 Incorrect 2 ms 7516 KB jury has the better answer: jans = YES, pans = NO
20 Halted 0 ms 0 KB -

Subtask #3
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 7768 KB answer = YES
2 Correct 2 ms 7516 KB answer = YES
3 Correct 2 ms 7516 KB answer = YES
4 Correct 2 ms 7516 KB answer = NO
5 Correct 2 ms 7516 KB answer = YES
6 Correct 2 ms 7516 KB answer = YES
7 Correct 2 ms 7516 KB answer = YES
8 Correct 3 ms 7516 KB answer = YES
9 Correct 2 ms 7516 KB answer = NO
10 Correct 2 ms 7516 KB answer = YES
11 Correct 2 ms 7516 KB answer = YES
12 Correct 2 ms 7516 KB answer = NO
13 Correct 2 ms 7516 KB answer = YES
14 Correct 2 ms 7620 KB answer = YES
15 Correct 2 ms 7516 KB answer = YES
16 Correct 2 ms 7516 KB answer = YES
17 Correct 2 ms 7516 KB answer = YES
18 Correct 2 ms 7512 KB answer = YES
19 Incorrect 2 ms 7516 KB jury has the better answer: jans = YES, pans = NO
20 Halted 0 ms 0 KB -

Subtask #4
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 7768 KB answer = YES
2 Correct 2 ms 7516 KB answer = YES
3 Correct 2 ms 7516 KB answer = YES
4 Correct 2 ms 7516 KB answer = NO
5 Correct 2 ms 7516 KB answer = YES
6 Correct 2 ms 7516 KB answer = YES
7 Correct 2 ms 7516 KB answer = YES
8 Correct 3 ms 7516 KB answer = YES
9 Correct 2 ms 7516 KB answer = NO
10 Correct 2 ms 7516 KB answer = YES
11 Correct 2 ms 7516 KB answer = YES
12 Correct 2 ms 7516 KB answer = NO
13 Correct 2 ms 7516 KB answer = YES
14 Correct 2 ms 7620 KB answer = YES
15 Correct 2 ms 7516 KB answer = YES
16 Correct 2 ms 7516 KB answer = YES
17 Correct 2 ms 7516 KB answer = YES
18 Correct 2 ms 7512 KB answer = YES
19 Incorrect 2 ms 7516 KB jury has the better answer: jans = YES, pans = NO
20 Halted 0 ms 0 KB -

Subtask #5
0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 7768 KB answer = YES
2 Correct 2 ms 7516 KB answer = YES
3 Correct 2 ms 7516 KB answer = YES
4 Correct 2 ms 7516 KB answer = NO
5 Correct 2 ms 7516 KB answer = YES
6 Correct 2 ms 7516 KB answer = YES
7 Correct 2 ms 7516 KB answer = YES
8 Correct 3 ms 7516 KB answer = YES
9 Correct 2 ms 7516 KB answer = NO
10 Correct 2 ms 7516 KB answer = YES
11 Correct 2 ms 7516 KB answer = YES
12 Correct 2 ms 7516 KB answer = NO
13 Correct 2 ms 7516 KB answer = YES
14 Correct 2 ms 7620 KB answer = YES
15 Correct 2 ms 7516 KB answer = YES
16 Correct 2 ms 7516 KB answer = YES
17 Correct 2 ms 7516 KB answer = YES
18 Correct 2 ms 7512 KB answer = YES
19 Incorrect 2 ms 7516 KB jury has the better answer: jans = YES, pans = NO
20 Halted 0 ms 0 KB -