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Submission #1084761

# Submission time Handle Problem Language Result Execution time Memory
1084761 2024-09-06T23:21:31 Z zxcigan Trains (BOI24_trains) C++17
16 / 100
 13 ms 4192 KB 
#include <bits/stdc++.h>

using namespace std;
using ll = long long;
#define int long long
const int N = 2e5;
const int mod = 1e9 + 7;
const int B = 335;
int dp[N];
int32_t main() {
#ifdef LOCAL
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif // LOCAL
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n;
    cin >> n;
    dp[1] = 1;
    int s = 0;
    vector<vector<int>> add (B + 1, vector<int> (B + 1, 0));
    set<array<int,2>> st;
    vector<int> pref (n + 3);
    int C = 0;
    for (int i = 1; i <= n; ++i) {
        int x, d;
        cin >> d >> x;
        if (i != 1) dp[i] = C;
        if (x && d) {
            (C += dp[i]) %= mod;
            (pref[min (n + 1, i + x * d)] += dp[i]) %= mod;
        }
        C -= pref[i];
        if (C < 0) C += mod;
        (s += dp[i]) %= mod;
    }
//    cout << dp[3] << '\n';
    cout << s << '\n';
}

Subtask #1
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 1116 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 1116 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1116 KB Output is correct
2 Correct 1 ms 1372 KB Output is correct
3 Correct 1 ms 1372 KB Output is correct
4 Correct 1 ms 1372 KB Output is correct
5 Correct 6 ms 2396 KB Output is correct
6 Correct 10 ms 3672 KB Output is correct
7 Correct 10 ms 3768 KB Output is correct
8 Correct 1 ms 1112 KB Output is correct
9 Correct 1 ms 1116 KB Output is correct
10 Correct 1 ms 1224 KB Output is correct
11 Correct 2 ms 1628 KB Output is correct
12 Correct 13 ms 4192 KB Output is correct
13 Correct 1 ms 1116 KB Output is correct
14 Correct 2 ms 1512 KB Output is correct
15 Correct 11 ms 3928 KB Output is correct

Subtask #4
0 / 34.0

# Verdict Execution time Memory Grader output
1 Incorrect 6 ms 1884 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 29.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 1116 KB Output isn't correct
2 Halted 0 ms 0 KB -