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Submission #951390

# Submission time Handle Problem Language Result Execution time Memory
951390 2024-03-21T22:23:56 Z study Connecting Supertrees (IOI20_supertrees) C++17
0 / 100
 1 ms 436 KB 
#include "supertrees.h"
#include <bits/stdc++.h>
using namespace std;

const int N = 1e3+1;

int comp[N], siz[N];

int getComp(int node){
        if (comp[node] != node) comp[node] = getComp(comp[node]);
        return comp[node];
}

bool merge(int a, int b, bool y){
        a = getComp(a);
        b = getComp(b);
        if (a != b){
                if (!y) return 1;
                if (siz[a] > siz[b]) swap(a,b);
                siz[b] += siz[a];
                comp[a] = b;
                return 1;
        }
        return 0;
}

int construct(vector<vector<int>> p) {
        int n = p.size();
        for (int i=0; i<n; ++i){
                comp[i] = i;
                siz[i] = 1;
        }
        vector<vector<int>> ans(n,vector<int>(n));
        for (int i=0; i<n; ++i){
                for (int j=i+1; j<n; ++j){
                        if (p[i][j] == 1){
                                merge(i,j,1);
                                ans[i][j] = 1;
                                ans[j][i] = 1;
                        }
                }
        }
        for (int i=0; i<n; ++i){
                for (int j=i+1; j<n; ++j){
                        if (p[i][j] == 0 and !merge(i,j,0)) return 0;
                }
        }
        build(ans);
        return 1;
}

Subtask #1
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Incorrect 0 ms 436 KB Too many ways to get from 0 to 2, should be 1 found no less than 2
4 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Incorrect 0 ms 436 KB Too many ways to get from 0 to 2, should be 1 found no less than 2
4 Halted 0 ms 0 KB -

Subtask #3
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Incorrect 0 ms 348 KB Answer gives possible 1 while actual possible 0
5 Halted 0 ms 0 KB -

Subtask #4
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Incorrect 0 ms 348 KB Too few ways to get from 0 to 1, should be 2 found 0
3 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Incorrect 0 ms 436 KB Too many ways to get from 0 to 2, should be 1 found no less than 2
4 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Incorrect 0 ms 436 KB Too many ways to get from 0 to 2, should be 1 found no less than 2
4 Halted 0 ms 0 KB -