oj.uz

Submission #675604

# Submission time Handle Problem Language Result Execution time Memory
675604 2022-12-27T13:53:38 Z penguin133 Pipes (CEOI15_pipes) C++14
20 / 100
 262 ms 65536 KB 
#include <bits/stdc++.h>
using namespace std;

#define int long long
#define pi pair<int, int>
#define pii pair<int, pi>
#define fi first
#define se second

int ret[200005], dep[200005], vis[200005];

vector<pi>v[200005], adj[200005];
int n, m;

inline int read() {
    int v = 0;
    char ch = getchar_unlocked();
    while ((ch & 16) == 0) ch = getchar_unlocked();
    while (ch & 16){
        v = (v * 10) + (ch & 15);
        ch = getchar_unlocked();
    }
    return v;
}
vector<pi>ans;

void dfs(int x, int p, int d){
	if(vis[x])return;
	vis[x] = 1;
	dep[x] = d;
	ret[x] = dep[x];
	for(auto [i, j] : v[x]){
		if(j == p)continue;
		if(vis[i]){
			ret[x] = min(ret[x], dep[i]);
			continue;
		}
		dfs(i, j, d + 1);
		if(ret[i] > dep[x])ans.push_back({i, x});
		ret[x] = min(ret[x], ret[i]);
	}
}

void dfs2(int x, int p){
	ret[x] = dep[x];
	for(auto [i, j] : v[x])if(j != p)ret[x] = min(ret[x], dep[i]);
	for(auto [i, j] : adj[x]){
		if(j == p)continue;
		dfs2(i, j);
		if(ret[i] > dep[x])ans.push_back({i, x});
		ret[x] = min(ret[x], ret[i]);
	}
	cerr << "VALUE " << x << " " << ret[x] << '\n';
}

int32_t main(){
	//ios::sync_with_stdio(0);cin.tie(0);
	n = read(), m = read();
	for(int i=1;i<=m;i++){
		int x = read(), y = read();
		v[x].push_back({y, i});
		v[y].push_back({x, i});
	}
	
	for(int i=1;i<=n;i++)if(!vis[i])dfs(i, -1, 1);
	for(auto [i, j] : ans)cout << i << " " << j << '\n';
}

Compilation message

pipes.cpp: In function 'void dfs(long long int, long long int, long long int)':
pipes.cpp:32:11: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   32 |  for(auto [i, j] : v[x]){
      |           ^
pipes.cpp: In function 'void dfs2(long long int, long long int)':
pipes.cpp:46:11: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   46 |  for(auto [i, j] : v[x])if(j != p)ret[x] = min(ret[x], dep[i]);
      |           ^
pipes.cpp:47:11: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   47 |  for(auto [i, j] : adj[x]){
      |           ^
pipes.cpp: In function 'int32_t main()':
pipes.cpp:66:11: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   66 |  for(auto [i, j] : ans)cout << i << " " << j << '\n';
      |           ^

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9684 KB Output is correct
2 Correct 5 ms 9708 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 10836 KB Output is correct
2 Correct 7 ms 10452 KB Output is correct

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 62 ms 46508 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 112 ms 62504 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 180 ms 65536 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 192 ms 65536 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 238 ms 65536 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 262 ms 65536 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 260 ms 65536 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 248 ms 65536 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -