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Submission #586412

# Submission time Handle Problem Language Result Execution time Memory
586412 2022-06-30T08:33:54 Z kideso Fountain (eJOI20_fountain) C++17
60 / 100
 1500 ms 7076 KB 
#include <iostream>
#include <queue>

using namespace std;

struct P {
    int d, v, n;
};

vector <P> x;
int N, Q;
bool ok = true;

int main(){
    cin >> N >> Q;

    x.assign(N + 1, { 0,0,0 });

    for (int i = 1; i <= N; ++i) {
        cin >> x[i].d >> x[i].v;
        if (x[i].d <= x[i - 1].d) ok = false;
    }

    if (ok) {
        vector<int> t(N + 1, 0);
        for (int i = 1; i <= N; ++i)
            t[i] = t[i - 1] + x[i].v;

        int ind, vol;

        while (Q--) {
            cin >> ind >> vol;

            auto it = lower_bound(t.begin(), t.end(), vol + t[ind - 1]);

            if (it == t.end()) cout << 0;
            else cout << it - t.begin();

            cout << '\n';
        }
    }
    else {
        x[N].n = N + 1;
        for (int i = N - 1; i >= 1; --i) {
            int j = i + 1;
            while (j != N + 1 && x[i].d >= x[j].d) {
                j = x[j].n;
            }

            x[i].n = j;
        }

        int ind, vol;
        while (Q--) {
            cin >> ind >> vol;

            int ans = ind;
            while (ans != N + 1 && vol > 0) {
                vol -= x[ans].v;
                if (vol > 0) ans = x[ans].n;
            }

            if (ans == N + 1) cout << 0;
            else cout << ans;

            cout << '\n';
        }
    }

    return 0;
}

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 2 ms 212 KB Output is correct
3 Correct 3 ms 312 KB Output is correct
4 Correct 4 ms 212 KB Output is correct
5 Correct 7 ms 340 KB Output is correct
6 Correct 5 ms 308 KB Output is correct
7 Correct 4 ms 212 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 292 ms 5368 KB Output is correct
2 Correct 340 ms 5540 KB Output is correct

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 2 ms 212 KB Output is correct
3 Correct 3 ms 312 KB Output is correct
4 Correct 4 ms 212 KB Output is correct
5 Correct 7 ms 340 KB Output is correct
6 Correct 5 ms 308 KB Output is correct
7 Correct 4 ms 212 KB Output is correct
8 Correct 292 ms 5368 KB Output is correct
9 Correct 340 ms 5540 KB Output is correct
10 Correct 4 ms 340 KB Output is correct
11 Correct 1370 ms 3324 KB Output is correct
12 Correct 440 ms 7076 KB Output is correct
13 Execution timed out 1581 ms 4092 KB Time limit exceeded
14 Halted 0 ms 0 KB -