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Submission #995309

# Submission time Handle Problem Language Result Execution time Memory
995309 2024-06-08T19:33:55 Z PagodePaiva Trains (BOI24_trains) C++17
21 / 100
 2000 ms 2396 KB 
#include<bits/stdc++.h>
#pragma GCC optmimization("Ofast")

using namespace std;

const int N = 1e5+10;
const int B = 500;
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 optmimization' [-Wunknown-pragmas]
    2 | #pragma GCC optmimization("Ofast")
      |

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1368 KB Output is correct
2 Correct 1 ms 1368 KB Output is correct
3 Correct 1 ms 1372 KB Output is correct
4 Correct 1 ms 1372 KB Output is correct
5 Correct 1 ms 1372 KB Output is correct
6 Correct 1 ms 1372 KB Output is correct
7 Correct 1 ms 1372 KB Output is correct
8 Correct 1 ms 1372 KB Output is correct
9 Correct 1 ms 1372 KB Output is correct
10 Correct 1 ms 1372 KB Output is correct
11 Correct 1 ms 1372 KB Output is correct
12 Correct 1 ms 1372 KB Output is correct
13 Correct 1 ms 1372 KB Output is correct
14 Correct 1 ms 1372 KB Output is correct
15 Correct 1 ms 1372 KB Output is correct
16 Correct 1 ms 1196 KB Output is correct
17 Correct 1 ms 1372 KB Output is correct
18 Correct 1 ms 1372 KB Output is correct
19 Correct 1 ms 1372 KB Output is correct

Subtask #2
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1368 KB Output is correct
2 Correct 1 ms 1368 KB Output is correct
3 Correct 1 ms 1372 KB Output is correct
4 Correct 1 ms 1372 KB Output is correct
5 Correct 1 ms 1372 KB Output is correct
6 Correct 1 ms 1372 KB Output is correct
7 Correct 1 ms 1372 KB Output is correct
8 Correct 1 ms 1372 KB Output is correct
9 Correct 1 ms 1372 KB Output is correct
10 Correct 1 ms 1372 KB Output is correct
11 Correct 1 ms 1372 KB Output is correct
12 Correct 1 ms 1372 KB Output is correct
13 Correct 1 ms 1372 KB Output is correct
14 Correct 1 ms 1372 KB Output is correct
15 Correct 1 ms 1372 KB Output is correct
16 Correct 1 ms 1196 KB Output is correct
17 Correct 1 ms 1372 KB Output is correct
18 Correct 1 ms 1372 KB Output is correct
19 Correct 1 ms 1372 KB Output is correct
20 Correct 22 ms 1372 KB Output is correct
21 Correct 5 ms 1372 KB Output is correct
22 Correct 15 ms 1368 KB Output is correct
23 Correct 73 ms 1372 KB Output is correct
24 Correct 6 ms 1368 KB Output is correct
25 Correct 17 ms 1372 KB Output is correct
26 Correct 42 ms 1472 KB Output is correct
27 Correct 141 ms 1372 KB Output is correct
28 Correct 33 ms 1368 KB Output is correct
29 Correct 192 ms 1372 KB Output is correct
30 Correct 14 ms 1372 KB Output is correct
31 Correct 102 ms 1552 KB Output is correct
32 Correct 193 ms 1368 KB Output is correct
33 Correct 15 ms 1368 KB Output is correct
34 Correct 13 ms 1372 KB Output is correct
35 Correct 13 ms 1560 KB Output is correct
36 Correct 22 ms 1372 KB Output is correct

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 1372 KB Output is correct
2 Correct 73 ms 1504 KB Output is correct
3 Correct 44 ms 1368 KB Output is correct
4 Correct 142 ms 1520 KB Output is correct
5 Correct 99 ms 2136 KB Output is correct
6 Execution timed out 2021 ms 2392 KB Time limit exceeded
7 Halted 0 ms 0 KB -

Subtask #4
0 / 34.0

# Verdict Execution time Memory Grader output
1 Correct 1273 ms 1992 KB Output is correct
2 Correct 892 ms 1880 KB Output is correct
3 Execution timed out 2063 ms 2396 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #5
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1368 KB Output is correct
2 Correct 1 ms 1368 KB Output is correct
3 Correct 1 ms 1372 KB Output is correct
4 Correct 1 ms 1372 KB Output is correct
5 Correct 1 ms 1372 KB Output is correct
6 Correct 1 ms 1372 KB Output is correct
7 Correct 1 ms 1372 KB Output is correct
8 Correct 1 ms 1372 KB Output is correct
9 Correct 1 ms 1372 KB Output is correct
10 Correct 1 ms 1372 KB Output is correct
11 Correct 1 ms 1372 KB Output is correct
12 Correct 1 ms 1372 KB Output is correct
13 Correct 1 ms 1372 KB Output is correct
14 Correct 1 ms 1372 KB Output is correct
15 Correct 1 ms 1372 KB Output is correct
16 Correct 1 ms 1196 KB Output is correct
17 Correct 1 ms 1372 KB Output is correct
18 Correct 1 ms 1372 KB Output is correct
19 Correct 1 ms 1372 KB Output is correct
20 Correct 22 ms 1372 KB Output is correct
21 Correct 5 ms 1372 KB Output is correct
22 Correct 15 ms 1368 KB Output is correct
23 Correct 73 ms 1372 KB Output is correct
24 Correct 6 ms 1368 KB Output is correct
25 Correct 17 ms 1372 KB Output is correct
26 Correct 42 ms 1472 KB Output is correct
27 Correct 141 ms 1372 KB Output is correct
28 Correct 33 ms 1368 KB Output is correct
29 Correct 192 ms 1372 KB Output is correct
30 Correct 14 ms 1372 KB Output is correct
31 Correct 102 ms 1552 KB Output is correct
32 Correct 193 ms 1368 KB Output is correct
33 Correct 15 ms 1368 KB Output is correct
34 Correct 13 ms 1372 KB Output is correct
35 Correct 13 ms 1560 KB Output is correct
36 Correct 22 ms 1372 KB Output is correct
37 Correct 2 ms 1372 KB Output is correct
38 Correct 73 ms 1504 KB Output is correct
39 Correct 44 ms 1368 KB Output is correct
40 Correct 142 ms 1520 KB Output is correct
41 Correct 99 ms 2136 KB Output is correct
42 Execution timed out 2021 ms 2392 KB Time limit exceeded
43 Halted 0 ms 0 KB -