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Submission #1011696

# Submission time Handle Problem Language Result Execution time Memory
1011696 2024-07-01T06:30:54 Z ttamx Trains (BOI24_trains) C++17
100 / 100
 177 ms 128592 KB 
#include <bits/stdc++.h>

using namespace std;

const int N=1e5+5;
const int K=320;
const int MOD=1e9+7;

int n;
int d[N],x[N];
int dp[N],add[N][K];
int ans;

void norm(int &x){
    if(x<0)x+=MOD;
    if(x>=MOD)x-=MOD;
}

int main(){
    cin.tie(nullptr)->sync_with_stdio(false);
    cin >> n;
    for(int i=1;i<=n;i++)cin >> d[i] >> x[i];
    dp[1]=1;
    for(int i=1;i<=n;i++){
        for(int j=0;j<K;j++){
            if(i-j>=0)norm(add[i][j]+=add[i-j][j]);
            norm(dp[i]+=add[i][j]);
        }
        if(d[i]<K){
            if(i+d[i]<=n)norm(add[i+d[i]][d[i]]+=dp[i]);
            if(i+1LL*d[i]*(x[i]+1)<=n)norm(add[i+d[i]*(x[i]+1)][d[i]]-=dp[i]);
        }else{
            for(int j=1;j<=x[i]&&i+1LL*j*d[i]<=n;j++){
                norm(dp[i+j*d[i]]+=dp[i]);
            }
        }
        norm(ans+=dp[i]);
    }
    cout << ans;
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 0 ms 2520 KB Output is correct
6 Correct 0 ms 2396 KB Output is correct
7 Correct 1 ms 2392 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 0 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 0 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 0 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 0 ms 2396 KB Output is correct
18 Correct 0 ms 2396 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct

Subtask #2
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 0 ms 2520 KB Output is correct
6 Correct 0 ms 2396 KB Output is correct
7 Correct 1 ms 2392 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 0 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 0 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 0 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 0 ms 2396 KB Output is correct
18 Correct 0 ms 2396 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 12 ms 12892 KB Output is correct
21 Correct 4 ms 6264 KB Output is correct
22 Correct 14 ms 15152 KB Output is correct
23 Correct 8 ms 10588 KB Output is correct
24 Correct 5 ms 7512 KB Output is correct
25 Correct 11 ms 13660 KB Output is correct
26 Correct 5 ms 8028 KB Output is correct
27 Correct 11 ms 13148 KB Output is correct
28 Correct 13 ms 15164 KB Output is correct
29 Correct 10 ms 15068 KB Output is correct
30 Correct 11 ms 15192 KB Output is correct
31 Correct 14 ms 15196 KB Output is correct
32 Correct 10 ms 15196 KB Output is correct
33 Correct 12 ms 14936 KB Output is correct
34 Correct 10 ms 15136 KB Output is correct
35 Correct 11 ms 15084 KB Output is correct
36 Correct 12 ms 15196 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2396 KB Output is correct
2 Correct 8 ms 10588 KB Output is correct
3 Correct 7 ms 8164 KB Output is correct
4 Correct 11 ms 13172 KB Output is correct
5 Correct 77 ms 99920 KB Output is correct
6 Correct 112 ms 126812 KB Output is correct
7 Correct 136 ms 126768 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 0 ms 2396 KB Output is correct
10 Correct 0 ms 2396 KB Output is correct
11 Correct 12 ms 14940 KB Output is correct
12 Correct 115 ms 126800 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 12 ms 14940 KB Output is correct
15 Correct 118 ms 126676 KB Output is correct

Subtask #4
34.0 / 34.0

# Verdict Execution time Memory Grader output
1 Correct 60 ms 63056 KB Output is correct
2 Correct 48 ms 52820 KB Output is correct
3 Correct 107 ms 126736 KB Output is correct
4 Correct 82 ms 92896 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 12 ms 15132 KB Output is correct
8 Correct 118 ms 126688 KB Output is correct

Subtask #5
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 0 ms 2520 KB Output is correct
6 Correct 0 ms 2396 KB Output is correct
7 Correct 1 ms 2392 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 0 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 0 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 0 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 0 ms 2396 KB Output is correct
18 Correct 0 ms 2396 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 12 ms 12892 KB Output is correct
21 Correct 4 ms 6264 KB Output is correct
22 Correct 14 ms 15152 KB Output is correct
23 Correct 8 ms 10588 KB Output is correct
24 Correct 5 ms 7512 KB Output is correct
25 Correct 11 ms 13660 KB Output is correct
26 Correct 5 ms 8028 KB Output is correct
27 Correct 11 ms 13148 KB Output is correct
28 Correct 13 ms 15164 KB Output is correct
29 Correct 10 ms 15068 KB Output is correct
30 Correct 11 ms 15192 KB Output is correct
31 Correct 14 ms 15196 KB Output is correct
32 Correct 10 ms 15196 KB Output is correct
33 Correct 12 ms 14936 KB Output is correct
34 Correct 10 ms 15136 KB Output is correct
35 Correct 11 ms 15084 KB Output is correct
36 Correct 12 ms 15196 KB Output is correct
37 Correct 0 ms 2396 KB Output is correct
38 Correct 8 ms 10588 KB Output is correct
39 Correct 7 ms 8164 KB Output is correct
40 Correct 11 ms 13172 KB Output is correct
41 Correct 77 ms 99920 KB Output is correct
42 Correct 112 ms 126812 KB Output is correct
43 Correct 136 ms 126768 KB Output is correct
44 Correct 0 ms 2396 KB Output is correct
45 Correct 0 ms 2396 KB Output is correct
46 Correct 0 ms 2396 KB Output is correct
47 Correct 12 ms 14940 KB Output is correct
48 Correct 115 ms 126800 KB Output is correct
49 Correct 1 ms 2396 KB Output is correct
50 Correct 12 ms 14940 KB Output is correct
51 Correct 118 ms 126676 KB Output is correct
52 Correct 60 ms 63056 KB Output is correct
53 Correct 48 ms 52820 KB Output is correct
54 Correct 107 ms 126736 KB Output is correct
55 Correct 82 ms 92896 KB Output is correct
56 Correct 0 ms 2396 KB Output is correct
57 Correct 1 ms 2396 KB Output is correct
58 Correct 12 ms 15132 KB Output is correct
59 Correct 118 ms 126688 KB Output is correct
60 Correct 106 ms 108624 KB Output is correct
61 Correct 113 ms 127828 KB Output is correct
62 Correct 116 ms 127316 KB Output is correct
63 Correct 109 ms 127572 KB Output is correct
64 Correct 114 ms 128592 KB Output is correct
65 Correct 177 ms 128080 KB Output is correct
66 Correct 104 ms 127824 KB Output is correct
67 Correct 105 ms 128396 KB Output is correct
68 Correct 112 ms 127824 KB Output is correct
69 Correct 165 ms 127472 KB Output is correct
70 Correct 111 ms 127828 KB Output is correct
71 Correct 112 ms 127572 KB Output is correct
72 Correct 176 ms 127780 KB Output is correct