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답안 #1052873

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1052873 2024-08-11T05:19:01 Z vjudge1 Trains (BOI24_trains) C++17
37 / 100
 167 ms 3440 KB 
#include <bits/stdc++.h>
using namespace std;

#define int long long
int const N=1e5+5;
int const mod=1e9+7;

int dp[N],suf[N],d[N],x[N];
int n;
void solve12(){
	dp[n]=1;
	for(int i=n-1;i>=1;i--){
		dp[i]=1;
		if(d[i]==0)
			continue;
		for(int j=i+d[i];j<=min(i+(d[i]*x[i]),n);j+=d[i])
			dp[i]=(dp[i]+dp[j])%mod;
	}
	cout<<dp[1]<<endl;
}
void solve3(){
	dp[n]=1;
	suf[n]=1;
	for(int i=n-1;i>=1;i--){
		dp[i]=(((1+suf[i+1]-suf[min(n+1,i+x[i]+1)])%mod)+mod)%mod;
		suf[i]=(dp[i]+suf[i+1])%mod;
	}
	cout<<dp[1]<<endl;
}

signed main(){
	cin>>n;
	bool b=1;
	for (int i = 1; i <=n; ++i){
		cin>>d[i]>>x[i];
		if(d[i]!=1)
			b=0;
	}
	if(n<=10000)
		solve12();
	else if(b)
		solve3();
	// else
	// 	solve4();
	return 0;
}

Subtask #1
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 1 ms 2420 KB Output is correct
7 Correct 0 ms 2396 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 2392 KB Output is correct
13 Correct 0 ms 2396 KB Output is correct
14 Correct 0 ms 2396 KB Output is correct
15 Correct 0 ms 2396 KB Output is correct
16 Correct 0 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 0 ms 2396 KB Output is correct

Subtask #2
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 1 ms 2420 KB Output is correct
7 Correct 0 ms 2396 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 2392 KB Output is correct
13 Correct 0 ms 2396 KB Output is correct
14 Correct 0 ms 2396 KB Output is correct
15 Correct 0 ms 2396 KB Output is correct
16 Correct 0 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 0 ms 2396 KB Output is correct
20 Correct 12 ms 2612 KB Output is correct
21 Correct 1 ms 2392 KB Output is correct
22 Correct 3 ms 2652 KB Output is correct
23 Correct 60 ms 2576 KB Output is correct
24 Correct 1 ms 2396 KB Output is correct
25 Correct 6 ms 2396 KB Output is correct
26 Correct 34 ms 2396 KB Output is correct
27 Correct 121 ms 2596 KB Output is correct
28 Correct 21 ms 2396 KB Output is correct
29 Correct 166 ms 2592 KB Output is correct
30 Correct 4 ms 2652 KB Output is correct
31 Correct 83 ms 2616 KB Output is correct
32 Correct 166 ms 2392 KB Output is correct
33 Correct 4 ms 2648 KB Output is correct
34 Correct 3 ms 2648 KB Output is correct
35 Correct 2 ms 2648 KB Output is correct
36 Correct 10 ms 2652 KB Output is correct

Subtask #3
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 62 ms 2564 KB Output is correct
3 Correct 34 ms 2396 KB Output is correct
4 Correct 121 ms 2600 KB Output is correct
5 Correct 14 ms 3164 KB Output is correct
6 Correct 34 ms 3412 KB Output is correct
7 Correct 28 ms 3440 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 166 ms 2600 KB Output is correct
12 Correct 29 ms 3412 KB Output is correct
13 Correct 1 ms 2392 KB Output is correct
14 Correct 167 ms 2396 KB Output is correct
15 Correct 27 ms 3420 KB Output is correct

Subtask #4
0 / 34.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 17 ms 2652 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 1 ms 2420 KB Output is correct
7 Correct 0 ms 2396 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 2392 KB Output is correct
13 Correct 0 ms 2396 KB Output is correct
14 Correct 0 ms 2396 KB Output is correct
15 Correct 0 ms 2396 KB Output is correct
16 Correct 0 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 0 ms 2396 KB Output is correct
20 Correct 12 ms 2612 KB Output is correct
21 Correct 1 ms 2392 KB Output is correct
22 Correct 3 ms 2652 KB Output is correct
23 Correct 60 ms 2576 KB Output is correct
24 Correct 1 ms 2396 KB Output is correct
25 Correct 6 ms 2396 KB Output is correct
26 Correct 34 ms 2396 KB Output is correct
27 Correct 121 ms 2596 KB Output is correct
28 Correct 21 ms 2396 KB Output is correct
29 Correct 166 ms 2592 KB Output is correct
30 Correct 4 ms 2652 KB Output is correct
31 Correct 83 ms 2616 KB Output is correct
32 Correct 166 ms 2392 KB Output is correct
33 Correct 4 ms 2648 KB Output is correct
34 Correct 3 ms 2648 KB Output is correct
35 Correct 2 ms 2648 KB Output is correct
36 Correct 10 ms 2652 KB Output is correct
37 Correct 1 ms 2396 KB Output is correct
38 Correct 62 ms 2564 KB Output is correct
39 Correct 34 ms 2396 KB Output is correct
40 Correct 121 ms 2600 KB Output is correct
41 Correct 14 ms 3164 KB Output is correct
42 Correct 34 ms 3412 KB Output is correct
43 Correct 28 ms 3440 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 166 ms 2600 KB Output is correct
48 Correct 29 ms 3412 KB Output is correct
49 Correct 1 ms 2392 KB Output is correct
50 Correct 167 ms 2396 KB Output is correct
51 Correct 27 ms 3420 KB Output is correct
52 Incorrect 17 ms 2652 KB Output isn't correct
53 Halted 0 ms 0 KB -