oj.uz

Submission #555857

# Submission time Handle Problem Language Result Execution time Memory
555857 2022-05-01T17:39:24 Z mihnea_tudor Restore Array (RMI19_restore) C++14
7 / 100
 600 ms 748 KB 
#include <bits/stdc++.h>

#define NMAX ((int)5e3)
#define INF  ((int)1e9)

using namespace std;

struct edge {
    int dest, cost;
};

int n, m;
vector<edge> a[NMAX + 1];

int dist[NMAX + 1];

bool bellmanford() {
    queue <int> Q;
    bitset <NMAX> in_queue(false);
    vector <int> cnt_in_queue(NMAX, 0);
    int negative_cycle = false;

    for (int i = 1; i <= n; ++i) {
        dist[i] = INF;
    }
 
    dist[0] = 0, Q.push(0), in_queue[0].flip();
    while (!Q.empty() && !negative_cycle)  {
        int x = Q.front();
        Q.pop();
        in_queue[x] = false;
        for (auto it = a[x].begin(); it != a[x].end(); ++ it) if (dist[x] < INF) {
            edge &next = *it;
            if (dist[next.dest] > dist[x] + next.cost) {
                dist[next.dest] = dist[x] + next.cost;
                if (!in_queue[next.dest]) {
                    if (cnt_in_queue[next.dest] > n)
                        return false;
                    else {
                        Q.push(next.dest);
                        in_queue[next.dest] = true;
                        cnt_in_queue[next.dest] ++;
                    }
                }
            }
        }
    }

    return true;
}

void add_constraint(int left, int right, int k, int val) {
    if (val == 0) {
        a[left - 1].push_back({right, (right - left + 1) - k});
    } else {
        a[right].push_back({left - 1, -((right - left + 1) - (k - 1))});
    }
}

int main(void) {
    scanf("%d %d", &n, &m);
    for (int i = 0; i < m; ++i) {
        int left, right, k, val;
        scanf("%d %d %d %d", &left, &right, &k, &val);

        ++left; ++right;
        add_constraint(left, right, k, val);
    }

    for (int i = 1; i <= n; ++i) {
        a[i - 1].push_back({i, 1});
        a[i].push_back({i - 1, 0});
    }

    if (!bellmanford()) {
        printf("-1\n");
        return 0;
    }

    for (int i = 1; i <= n; ++i) {
        printf("%d ", dist[i] - dist[i - 1]);
    }

    printf("\n");

    return 0;
}

Compilation message

restore.cpp: In function 'int main()':
restore.cpp:61:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   61 |     scanf("%d %d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~~
restore.cpp:64:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   64 |         scanf("%d %d %d %d", &left, &right, &k, &val);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct

Subtask #2
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 724 KB Output is correct
2 Correct 13 ms 704 KB Output is correct
3 Correct 13 ms 748 KB Output is correct
4 Correct 13 ms 724 KB Output is correct
5 Execution timed out 1097 ms 724 KB Time limit exceeded
6 Halted 0 ms 0 KB -

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 724 KB Output is correct
2 Correct 13 ms 704 KB Output is correct
3 Correct 13 ms 748 KB Output is correct
4 Correct 13 ms 724 KB Output is correct
5 Execution timed out 1097 ms 724 KB Time limit exceeded
6 Halted 0 ms 0 KB -

Subtask #4
0 / 55.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 12 ms 724 KB Output is correct
12 Correct 13 ms 704 KB Output is correct
13 Correct 13 ms 748 KB Output is correct
14 Correct 13 ms 724 KB Output is correct
15 Execution timed out 1097 ms 724 KB Time limit exceeded
16 Halted 0 ms 0 KB -