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Submission #995311

# Submission time Handle Problem Language Result Execution time Memory
995311 2024-06-08T19:35:22 Z PagodePaiva Trains (BOI24_trains) C++17
21 / 100
 2000 ms 1880 KB 
#include<bits/stdc++.h>
#pragma GCC optimization("Ofast")

using namespace std;

const int N = 1e5+10;
const int B = sqrt(N);
int n;
int d[N], x[N], dp[N];
int pref[B][B];
const int mod = 1e9+7;

void calc(int pos){
    if(d[pos] == 0) return;
    int comp = x[pos];
    comp = min(comp, (n-pos)/d[pos]);
    //cout << pos << ' ' << comp << ' ';
    if(pos+comp*d[pos] <= n){
        for(int i = 1;i <= comp;i++){
            dp[pos] += dp[pos+d[pos]*i];
            dp[pos] %= mod;
        }
        return;
    }
    else{
        dp[pos] += pref[d[pos]][pos % d[pos]];
        dp[pos] %= mod;
        return;
    }
}

void upd(int pos){
    for(int i = 1;i < B;i++){
        pref[i][pos % i] += dp[pos];
        pref[i][pos % i] %= mod;
    }
    return;
}

int main(){
    ios::sync_with_stdio(false); cin.tie(0);
    cin >> n;
    for(int i = 1;i <= n;i++){
        cin >> d[i] >> x[i];
    }
    for(int i = 1;i <= n;i++){
        dp[i] = 1;
    }
    for(int i = n;i >= 1;i--){
        calc(i);
        upd(i);
    }
    cout << dp[1] << '\n';
    return 0;
}

Compilation message

Main.cpp:2: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    2 | #pragma GCC optimization("Ofast")
      |

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 604 KB Output is correct
2 Correct 0 ms 604 KB Output is correct
3 Correct 1 ms 860 KB Output is correct
4 Correct 0 ms 860 KB Output is correct
5 Correct 0 ms 860 KB Output is correct
6 Correct 0 ms 860 KB Output is correct
7 Correct 0 ms 860 KB Output is correct
8 Correct 0 ms 604 KB Output is correct
9 Correct 0 ms 860 KB Output is correct
10 Correct 1 ms 860 KB Output is correct
11 Correct 0 ms 856 KB Output is correct
12 Correct 0 ms 860 KB Output is correct
13 Correct 0 ms 860 KB Output is correct
14 Correct 0 ms 604 KB Output is correct
15 Correct 0 ms 604 KB Output is correct
16 Correct 0 ms 604 KB Output is correct
17 Correct 0 ms 860 KB Output is correct
18 Correct 0 ms 860 KB Output is correct
19 Correct 0 ms 860 KB Output is correct

Subtask #2
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 604 KB Output is correct
2 Correct 0 ms 604 KB Output is correct
3 Correct 1 ms 860 KB Output is correct
4 Correct 0 ms 860 KB Output is correct
5 Correct 0 ms 860 KB Output is correct
6 Correct 0 ms 860 KB Output is correct
7 Correct 0 ms 860 KB Output is correct
8 Correct 0 ms 604 KB Output is correct
9 Correct 0 ms 860 KB Output is correct
10 Correct 1 ms 860 KB Output is correct
11 Correct 0 ms 856 KB Output is correct
12 Correct 0 ms 860 KB Output is correct
13 Correct 0 ms 860 KB Output is correct
14 Correct 0 ms 604 KB Output is correct
15 Correct 0 ms 604 KB Output is correct
16 Correct 0 ms 604 KB Output is correct
17 Correct 0 ms 860 KB Output is correct
18 Correct 0 ms 860 KB Output is correct
19 Correct 0 ms 860 KB Output is correct
20 Correct 17 ms 860 KB Output is correct
21 Correct 3 ms 860 KB Output is correct
22 Correct 9 ms 980 KB Output is correct
23 Correct 70 ms 860 KB Output is correct
24 Correct 4 ms 856 KB Output is correct
25 Correct 13 ms 860 KB Output is correct
26 Correct 42 ms 860 KB Output is correct
27 Correct 137 ms 860 KB Output is correct
28 Correct 29 ms 856 KB Output is correct
29 Correct 187 ms 960 KB Output is correct
30 Correct 9 ms 860 KB Output is correct
31 Correct 98 ms 860 KB Output is correct
32 Correct 188 ms 856 KB Output is correct
33 Correct 10 ms 860 KB Output is correct
34 Correct 8 ms 980 KB Output is correct
35 Correct 8 ms 860 KB Output is correct
36 Correct 17 ms 980 KB Output is correct

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 860 KB Output is correct
2 Correct 70 ms 920 KB Output is correct
3 Correct 42 ms 860 KB Output is correct
4 Correct 138 ms 860 KB Output is correct
5 Correct 60 ms 1628 KB Output is correct
6 Execution timed out 2025 ms 1880 KB Time limit exceeded
7 Halted 0 ms 0 KB -

Subtask #4
0 / 34.0

# Verdict Execution time Memory Grader output
1 Correct 1247 ms 1404 KB Output is correct
2 Correct 870 ms 1308 KB Output is correct
3 Execution timed out 2029 ms 1880 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #5
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 604 KB Output is correct
2 Correct 0 ms 604 KB Output is correct
3 Correct 1 ms 860 KB Output is correct
4 Correct 0 ms 860 KB Output is correct
5 Correct 0 ms 860 KB Output is correct
6 Correct 0 ms 860 KB Output is correct
7 Correct 0 ms 860 KB Output is correct
8 Correct 0 ms 604 KB Output is correct
9 Correct 0 ms 860 KB Output is correct
10 Correct 1 ms 860 KB Output is correct
11 Correct 0 ms 856 KB Output is correct
12 Correct 0 ms 860 KB Output is correct
13 Correct 0 ms 860 KB Output is correct
14 Correct 0 ms 604 KB Output is correct
15 Correct 0 ms 604 KB Output is correct
16 Correct 0 ms 604 KB Output is correct
17 Correct 0 ms 860 KB Output is correct
18 Correct 0 ms 860 KB Output is correct
19 Correct 0 ms 860 KB Output is correct
20 Correct 17 ms 860 KB Output is correct
21 Correct 3 ms 860 KB Output is correct
22 Correct 9 ms 980 KB Output is correct
23 Correct 70 ms 860 KB Output is correct
24 Correct 4 ms 856 KB Output is correct
25 Correct 13 ms 860 KB Output is correct
26 Correct 42 ms 860 KB Output is correct
27 Correct 137 ms 860 KB Output is correct
28 Correct 29 ms 856 KB Output is correct
29 Correct 187 ms 960 KB Output is correct
30 Correct 9 ms 860 KB Output is correct
31 Correct 98 ms 860 KB Output is correct
32 Correct 188 ms 856 KB Output is correct
33 Correct 10 ms 860 KB Output is correct
34 Correct 8 ms 980 KB Output is correct
35 Correct 8 ms 860 KB Output is correct
36 Correct 17 ms 980 KB Output is correct
37 Correct 0 ms 860 KB Output is correct
38 Correct 70 ms 920 KB Output is correct
39 Correct 42 ms 860 KB Output is correct
40 Correct 138 ms 860 KB Output is correct
41 Correct 60 ms 1628 KB Output is correct
42 Execution timed out 2025 ms 1880 KB Time limit exceeded
43 Halted 0 ms 0 KB -