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Submission #602510

# Submission time Handle Problem Language Result Execution time Memory
602510 2022-07-23T07:23:39 Z snasibov05 Jakarta Skyscrapers (APIO15_skyscraper) C++14
0 / 100
 1 ms 212 KB 
#include <bits/stdc++.h>

using namespace std;

#define oo 1000000000000000000ll
#define int long long

signed main() {
    int n, m; cin >> n >> m;
    vector<int> b(m), p(m);
    for (int i = 0; i < m; ++i) cin >> b[i] >> p[i];

    vector<vector<int>> v(n);
    for (int i = 0; i < m; ++i) v[b[i]].push_back(i);

    vector<vector<int>> ed(m, vector<int>(m, oo));
    for (int i = 0; i < m; ++i){
        int cnt = 0;
        for (int j = b[i] + p[i]; j < n; j += p[i]) {
            cnt++;
            for (auto to : v[j]) ed[i][to] = min(ed[i][to], cnt);
        }
        for (int j = b[i] - p[i]; j >= 0; j -= p[i]){
            cnt++;
            for (auto to : v[j]) ed[i][to] = min(ed[i][to], cnt);
        }
    }

    vector<int> d(m, oo); d[0] = 0;
    vector<bool> visited(m);
    for (int i = 0; i < m; ++i){
        int mn = -1;
        for (int j = 0; j < m; ++j){
            if (!visited[j] && (mn == -1 || d[mn] > d[j])) mn = j;
        }

        visited[mn] = true;
        for (int j = 0; j < m; ++j){
            if (visited[j]) continue;
            if (d[j] > d[mn] + ed[mn][j]) d[j] = d[mn] + ed[mn][j];
        }
    }

    int ans = d[1];
    if (ans == oo) ans = -1;
    cout << ans << "\n";

    return 0;
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Incorrect 0 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Incorrect 0 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Incorrect 0 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Incorrect 0 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Incorrect 0 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -