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Submission #994965

# Submission time Handle Problem Language Result Execution time Memory
994965 2024-06-08T08:56:31 Z salmon Trains (BOI24_trains) C++14
100 / 100
 199 ms 249800 KB 
#include <bits/stdc++.h>
using namespace std;

vector<int> v;
map<int,long long int> mep[100100];
vector<int> rebove[100100];
int N;
long long int d,x;
vector<pair<int,int>> iv;
long long int num[100100];
long long int mod = 1'000'000'007;
const int B = 300;
long long int blom[100100][B + 5];

int main(){
	
	scanf(" %d",&N);
	
	for(int i = 0; i < N; i++){
		scanf(" %lld",&d);
		scanf(" %lld",&x);
		iv.push_back({d,x});
		num[i] = 0;
		
		if(d <= B) rebove[min((long long int)N,i + d * x)].push_back(i);
	}
	
	num[0]= 1;
	long long int sum = 0;
	
	for(int i = 0; i < N; i++){
		num[i] %= mod;
		
		for(int j : rebove[i]){
			blom[i][iv[j].first] -= num[j];
			blom[i][iv[j].first] %= mod;
		}
		
		
		if(iv[i].first <= B){
			blom[i][iv[i].first] += num[i];
			blom[i][iv[i].first] %= mod;
		}
		else{
			int d = iv[i].first;
			int x = iv[i].second;
			for(int j = 1; j <= x && i + j * d < N; j++){
				num[i + j * d] += num[i];
			}
		}
		
		for(int j = 1; j <= B; j++){
			num[min(N,i + j)] += blom[i][j];
			blom[min(N,i + j)][j] += blom[i][j];
			
			blom[min(N,i + j)][j] %= mod;
		}
		
		sum = (sum + num[i]) % mod;
	}
	
	printf("%lld",(sum + mod) % mod);
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:17:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |  scanf(" %d",&N);
      |  ~~~~~^~~~~~~~~~
Main.cpp:20:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |   scanf(" %lld",&d);
      |   ~~~~~^~~~~~~~~~~~
Main.cpp:21:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |   scanf(" %lld",&x);
      |   ~~~~~^~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 9048 KB Output is correct
2 Correct 2 ms 9048 KB Output is correct
3 Correct 2 ms 9052 KB Output is correct
4 Correct 2 ms 9052 KB Output is correct
5 Correct 2 ms 9048 KB Output is correct
6 Correct 2 ms 9052 KB Output is correct
7 Correct 2 ms 9052 KB Output is correct
8 Correct 2 ms 9048 KB Output is correct
9 Correct 2 ms 9052 KB Output is correct
10 Correct 2 ms 9052 KB Output is correct
11 Correct 1 ms 9052 KB Output is correct
12 Correct 2 ms 9052 KB Output is correct
13 Correct 2 ms 9048 KB Output is correct
14 Correct 2 ms 9048 KB Output is correct
15 Correct 1 ms 9052 KB Output is correct
16 Correct 1 ms 9052 KB Output is correct
17 Correct 2 ms 9048 KB Output is correct
18 Correct 2 ms 9052 KB Output is correct
19 Correct 2 ms 9064 KB Output is correct

Subtask #2
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 9048 KB Output is correct
2 Correct 2 ms 9048 KB Output is correct
3 Correct 2 ms 9052 KB Output is correct
4 Correct 2 ms 9052 KB Output is correct
5 Correct 2 ms 9048 KB Output is correct
6 Correct 2 ms 9052 KB Output is correct
7 Correct 2 ms 9052 KB Output is correct
8 Correct 2 ms 9048 KB Output is correct
9 Correct 2 ms 9052 KB Output is correct
10 Correct 2 ms 9052 KB Output is correct
11 Correct 1 ms 9052 KB Output is correct
12 Correct 2 ms 9052 KB Output is correct
13 Correct 2 ms 9048 KB Output is correct
14 Correct 2 ms 9048 KB Output is correct
15 Correct 1 ms 9052 KB Output is correct
16 Correct 1 ms 9052 KB Output is correct
17 Correct 2 ms 9048 KB Output is correct
18 Correct 2 ms 9052 KB Output is correct
19 Correct 2 ms 9064 KB Output is correct
20 Correct 17 ms 29020 KB Output is correct
21 Correct 8 ms 15964 KB Output is correct
22 Correct 22 ms 32992 KB Output is correct
23 Correct 15 ms 24444 KB Output is correct
24 Correct 11 ms 18908 KB Output is correct
25 Correct 24 ms 30396 KB Output is correct
26 Correct 10 ms 19800 KB Output is correct
27 Correct 18 ms 29532 KB Output is correct
28 Correct 22 ms 32984 KB Output is correct
29 Correct 26 ms 33116 KB Output is correct
30 Correct 19 ms 33020 KB Output is correct
31 Correct 21 ms 33104 KB Output is correct
32 Correct 20 ms 33116 KB Output is correct
33 Correct 21 ms 33116 KB Output is correct
34 Correct 19 ms 33116 KB Output is correct
35 Correct 21 ms 33112 KB Output is correct
36 Correct 20 ms 33116 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 9052 KB Output is correct
2 Correct 13 ms 24668 KB Output is correct
3 Correct 11 ms 19804 KB Output is correct
4 Correct 17 ms 29532 KB Output is correct
5 Correct 141 ms 195668 KB Output is correct
6 Correct 187 ms 248908 KB Output is correct
7 Correct 180 ms 249112 KB Output is correct
8 Correct 1 ms 9052 KB Output is correct
9 Correct 1 ms 9052 KB Output is correct
10 Correct 2 ms 8892 KB Output is correct
11 Correct 20 ms 32896 KB Output is correct
12 Correct 181 ms 248776 KB Output is correct
13 Correct 1 ms 9052 KB Output is correct
14 Correct 21 ms 33116 KB Output is correct
15 Correct 172 ms 248908 KB Output is correct

Subtask #4
34.0 / 34.0

# Verdict Execution time Memory Grader output
1 Correct 90 ms 124676 KB Output is correct
2 Correct 74 ms 105164 KB Output is correct
3 Correct 180 ms 248772 KB Output is correct
4 Correct 131 ms 181188 KB Output is correct
5 Correct 2 ms 9048 KB Output is correct
6 Correct 2 ms 9048 KB Output is correct
7 Correct 23 ms 32996 KB Output is correct
8 Correct 185 ms 248776 KB Output is correct

Subtask #5
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 9048 KB Output is correct
2 Correct 2 ms 9048 KB Output is correct
3 Correct 2 ms 9052 KB Output is correct
4 Correct 2 ms 9052 KB Output is correct
5 Correct 2 ms 9048 KB Output is correct
6 Correct 2 ms 9052 KB Output is correct
7 Correct 2 ms 9052 KB Output is correct
8 Correct 2 ms 9048 KB Output is correct
9 Correct 2 ms 9052 KB Output is correct
10 Correct 2 ms 9052 KB Output is correct
11 Correct 1 ms 9052 KB Output is correct
12 Correct 2 ms 9052 KB Output is correct
13 Correct 2 ms 9048 KB Output is correct
14 Correct 2 ms 9048 KB Output is correct
15 Correct 1 ms 9052 KB Output is correct
16 Correct 1 ms 9052 KB Output is correct
17 Correct 2 ms 9048 KB Output is correct
18 Correct 2 ms 9052 KB Output is correct
19 Correct 2 ms 9064 KB Output is correct
20 Correct 17 ms 29020 KB Output is correct
21 Correct 8 ms 15964 KB Output is correct
22 Correct 22 ms 32992 KB Output is correct
23 Correct 15 ms 24444 KB Output is correct
24 Correct 11 ms 18908 KB Output is correct
25 Correct 24 ms 30396 KB Output is correct
26 Correct 10 ms 19800 KB Output is correct
27 Correct 18 ms 29532 KB Output is correct
28 Correct 22 ms 32984 KB Output is correct
29 Correct 26 ms 33116 KB Output is correct
30 Correct 19 ms 33020 KB Output is correct
31 Correct 21 ms 33104 KB Output is correct
32 Correct 20 ms 33116 KB Output is correct
33 Correct 21 ms 33116 KB Output is correct
34 Correct 19 ms 33116 KB Output is correct
35 Correct 21 ms 33112 KB Output is correct
36 Correct 20 ms 33116 KB Output is correct
37 Correct 1 ms 9052 KB Output is correct
38 Correct 13 ms 24668 KB Output is correct
39 Correct 11 ms 19804 KB Output is correct
40 Correct 17 ms 29532 KB Output is correct
41 Correct 141 ms 195668 KB Output is correct
42 Correct 187 ms 248908 KB Output is correct
43 Correct 180 ms 249112 KB Output is correct
44 Correct 1 ms 9052 KB Output is correct
45 Correct 1 ms 9052 KB Output is correct
46 Correct 2 ms 8892 KB Output is correct
47 Correct 20 ms 32896 KB Output is correct
48 Correct 181 ms 248776 KB Output is correct
49 Correct 1 ms 9052 KB Output is correct
50 Correct 21 ms 33116 KB Output is correct
51 Correct 172 ms 248908 KB Output is correct
52 Correct 90 ms 124676 KB Output is correct
53 Correct 74 ms 105164 KB Output is correct
54 Correct 180 ms 248772 KB Output is correct
55 Correct 131 ms 181188 KB Output is correct
56 Correct 2 ms 9048 KB Output is correct
57 Correct 2 ms 9048 KB Output is correct
58 Correct 23 ms 32996 KB Output is correct
59 Correct 185 ms 248776 KB Output is correct
60 Correct 153 ms 209344 KB Output is correct
61 Correct 177 ms 248712 KB Output is correct
62 Correct 184 ms 249800 KB Output is correct
63 Correct 184 ms 248868 KB Output is correct
64 Correct 182 ms 248260 KB Output is correct
65 Correct 187 ms 248264 KB Output is correct
66 Correct 180 ms 248896 KB Output is correct
67 Correct 180 ms 247948 KB Output is correct
68 Correct 185 ms 249580 KB Output is correct
69 Correct 199 ms 249544 KB Output is correct
70 Correct 182 ms 248004 KB Output is correct
71 Correct 173 ms 248028 KB Output is correct
72 Correct 185 ms 248776 KB Output is correct