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Submission #534621

# Submission time Handle Problem Language Result Execution time Memory
534621 2022-03-08T12:02:17 Z perchuts Pipes (CEOI15_pipes) C++17
0 / 100
 981 ms 65536 KB 
#include <bits/stdc++.h>
#define maxn (int)(1e5+51)
#define all(x) x.begin(), x.end()
#define sz(x) (int) x.size()
#define endl '\n'
#define ll long long
#define pb push_back
#define ull unsigned long long
#define ii pair<int,int>
#define iii tuple<int,int,int>
#define inf 2000000001
#define mod 1000000007 //998244353
#define _ ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);

using namespace std;

template<typename X, typename Y> bool ckmin(X& x, const Y& y) { return (y < x) ? (x=y,1):0; }
template<typename X, typename Y> bool ckmax(X& x, const Y& y) { return (x < y) ? (x=y,1):0; }

int lvl[maxn], par[maxn], lvl2[maxn];

int findp(int x){return par[x] = (x==par[x]?x:findp(par[x]));}

bool samep(int x,int y){return findp(x)==findp(y);}

bool merge(int x,int y){
    int a = x, b = y, flag=0;
    x = findp(x), y = findp(y);
    if(x==y)return 0;
    if(lvl[x]<lvl[y]){
        swap(x,y);
        flag = 1;
    }
    par[y] = x;
    lvl[x] += lvl[y]==lvl[x];
    if(!flag)lvl2[b]=lvl2[a]+1;
    else lvl2[a]=lvl2[b]+1;
    return 1;
}

int main(){_
    int n,m;cin>>n>>m;
    for(int i=1;i<=n;++i)lvl[i] = 0, par[i] = i;
    int ans = m;
    for(int i=0;i<m;++i){
        int a,b;cin>>a>>b;
        if(!merge(a,b)){
            int cur = a;
            while(lvl2[cur]!=0){
                --ans, lvl2[cur] = 0;
                cur = par[cur];
            }            
            cur = b;
            while(lvl2[cur]!=0){
                --ans, lvl2[cur] = 0;
                cur = par[cur];
            }
        }
    }
    for(int i=1;i<=n;++i){
        if(lvl2[i])cout<<i<<" "<<par[i]<<endl;
    }
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 204 KB Wrong number of edges
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 480 KB Wrong number of edges
2 Halted 0 ms 0 KB -

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 84 ms 5700 KB Output is correct
2 Incorrect 80 ms 5572 KB Wrong number of edges
3 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 142 ms 9288 KB Output is correct
2 Incorrect 156 ms 11668 KB Wrong number of edges
3 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 236 ms 9240 KB Output is correct
2 Incorrect 201 ms 14740 KB Wrong number of edges
3 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 288 ms 9972 KB Output is correct
2 Runtime error 249 ms 19292 KB Memory limit exceeded
3 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 503 ms 24772 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 630 ms 45224 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 777 ms 56876 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 981 ms 65536 KB Memory limit exceeded
2 Halted 0 ms 0 KB -