oj.uz

Submission #1011471

# Submission time Handle Problem Language Result Execution time Memory
1011471 2024-06-30T14:04:11 Z gutzzy Shortcut (IOI16_shortcut) C++17
0 / 100
 0 ms 436 KB 
#include <bits/stdc++.h>
using namespace std;
const long long inf = 9223372036854775807;
vector<vector<long long>> m;

void floyd_warshall(int n){
    for(int k=0;k<n;k++){
        for(int i=0;i<2*n;i++){
            for(int j=0;j<2*n;j++){
                if((m[i][j]>m[i][k]+m[k][j]) and m[k][j]!=inf and m[i][k] != inf){
                    m[i][j] = m[i][k] + m[k][j];
                }
            }
        }
    }
    return;
}

long long diam(vector<vector<long long>> &g, int n){
    long long res = 0;
    for(int i=0;i<2*n;i++){
        for(int j=i;j<2*n;j++){
            res = max(res,g[i][j]);
        }
    }
    return res;
}

long long find_shortcut(int n, vector<int> l, vector<int> d, int c){
    m = vector<vector<long long>> (2*n,vector<long long>(2*n,inf));
    for(int i=0;i<2*n;i++) m[i][i] = 0;
    long long ans = inf;
    for(int i=0;i<n-1;i++){
        m[i][i+1] = (long long) l[i];
        m[i+1][i] = (long long) l[i];
    }
    for(int i=0;i<n;i++){
        m[i][n+i] = (long long) d[i];
        m[n+i][i] = (long long) d[i];
    }
    vector<vector<long long>> mm = m;
    for(int i=0;i<n;i++){
        for(int j=i+1;j<n;j++){
            // express railroad entre i & j
            if(m[i][j]<=c) continue;
            m[i][j] = c;
            m[j][i] = c;
            floyd_warshall(n);
            ans = min(ans, diam(m,n));
            m = mm;
        }
    }
    return ans;
}

/*

int main(){
    
    cout << find_shortcut(2, {5}, {3, 0}, 1) << endl;

    return 0;
}
*/

Subtask #1
0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB n = 4, 80 is a correct answer
2 Correct 0 ms 348 KB n = 9, 110 is a correct answer
3 Correct 0 ms 348 KB n = 4, 21 is a correct answer
4 Correct 0 ms 348 KB n = 3, 4 is a correct answer
5 Correct 0 ms 436 KB n = 2, 62 is a correct answer
6 Incorrect 0 ms 348 KB n = 2, incorrect answer: jury 3 vs contestant 9223372036854775807
7 Halted 0 ms 0 KB -

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB n = 4, 80 is a correct answer
2 Correct 0 ms 348 KB n = 9, 110 is a correct answer
3 Correct 0 ms 348 KB n = 4, 21 is a correct answer
4 Correct 0 ms 348 KB n = 3, 4 is a correct answer
5 Correct 0 ms 436 KB n = 2, 62 is a correct answer
6 Incorrect 0 ms 348 KB n = 2, incorrect answer: jury 3 vs contestant 9223372036854775807
7 Halted 0 ms 0 KB -

Subtask #3
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB n = 4, 80 is a correct answer
2 Correct 0 ms 348 KB n = 9, 110 is a correct answer
3 Correct 0 ms 348 KB n = 4, 21 is a correct answer
4 Correct 0 ms 348 KB n = 3, 4 is a correct answer
5 Correct 0 ms 436 KB n = 2, 62 is a correct answer
6 Incorrect 0 ms 348 KB n = 2, incorrect answer: jury 3 vs contestant 9223372036854775807
7 Halted 0 ms 0 KB -

Subtask #4
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB n = 4, 80 is a correct answer
2 Correct 0 ms 348 KB n = 9, 110 is a correct answer
3 Correct 0 ms 348 KB n = 4, 21 is a correct answer
4 Correct 0 ms 348 KB n = 3, 4 is a correct answer
5 Correct 0 ms 436 KB n = 2, 62 is a correct answer
6 Incorrect 0 ms 348 KB n = 2, incorrect answer: jury 3 vs contestant 9223372036854775807
7 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB n = 4, 80 is a correct answer
2 Correct 0 ms 348 KB n = 9, 110 is a correct answer
3 Correct 0 ms 348 KB n = 4, 21 is a correct answer
4 Correct 0 ms 348 KB n = 3, 4 is a correct answer
5 Correct 0 ms 436 KB n = 2, 62 is a correct answer
6 Incorrect 0 ms 348 KB n = 2, incorrect answer: jury 3 vs contestant 9223372036854775807
7 Halted 0 ms 0 KB -

Subtask #6
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB n = 4, 80 is a correct answer
2 Correct 0 ms 348 KB n = 9, 110 is a correct answer
3 Correct 0 ms 348 KB n = 4, 21 is a correct answer
4 Correct 0 ms 348 KB n = 3, 4 is a correct answer
5 Correct 0 ms 436 KB n = 2, 62 is a correct answer
6 Incorrect 0 ms 348 KB n = 2, incorrect answer: jury 3 vs contestant 9223372036854775807
7 Halted 0 ms 0 KB -

Subtask #7
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB n = 4, 80 is a correct answer
2 Correct 0 ms 348 KB n = 9, 110 is a correct answer
3 Correct 0 ms 348 KB n = 4, 21 is a correct answer
4 Correct 0 ms 348 KB n = 3, 4 is a correct answer
5 Correct 0 ms 436 KB n = 2, 62 is a correct answer
6 Incorrect 0 ms 348 KB n = 2, incorrect answer: jury 3 vs contestant 9223372036854775807
7 Halted 0 ms 0 KB -

Subtask #8
0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB n = 4, 80 is a correct answer
2 Correct 0 ms 348 KB n = 9, 110 is a correct answer
3 Correct 0 ms 348 KB n = 4, 21 is a correct answer
4 Correct 0 ms 348 KB n = 3, 4 is a correct answer
5 Correct 0 ms 436 KB n = 2, 62 is a correct answer
6 Incorrect 0 ms 348 KB n = 2, incorrect answer: jury 3 vs contestant 9223372036854775807
7 Halted 0 ms 0 KB -