oj.uz

Submission #994954

# Submission time Handle Problem Language Result Execution time Memory
994954 2024-06-08T08:50:35 Z salmon Trains (BOI24_trains) C++14
8 / 100
 16 ms 18644 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;
int blom[B + 5][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;
		
		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];
		}
		
		
		if(iv[i].first <= B){
			blom[i][iv[i].first] += num[i];
		}
		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];
		}
		
		sum = (sum + num[i]) % mod;
	}
	
	printf("%lld",sum);
}

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 8280 KB Output is correct
2 Correct 2 ms 8280 KB Output is correct
3 Correct 2 ms 8444 KB Output is correct
4 Correct 2 ms 8284 KB Output is correct
5 Correct 1 ms 8284 KB Output is correct
6 Correct 2 ms 8284 KB Output is correct
7 Correct 2 ms 8284 KB Output is correct
8 Correct 2 ms 8284 KB Output is correct
9 Correct 2 ms 8284 KB Output is correct
10 Correct 2 ms 8284 KB Output is correct
11 Correct 1 ms 8284 KB Output is correct
12 Correct 2 ms 8284 KB Output is correct
13 Correct 2 ms 8284 KB Output is correct
14 Correct 3 ms 8388 KB Output is correct
15 Correct 2 ms 8284 KB Output is correct
16 Correct 2 ms 8284 KB Output is correct
17 Correct 2 ms 8284 KB Output is correct
18 Correct 2 ms 8284 KB Output is correct
19 Correct 2 ms 8284 KB Output is correct

Subtask #2
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 8280 KB Output is correct
2 Correct 2 ms 8280 KB Output is correct
3 Correct 2 ms 8444 KB Output is correct
4 Correct 2 ms 8284 KB Output is correct
5 Correct 1 ms 8284 KB Output is correct
6 Correct 2 ms 8284 KB Output is correct
7 Correct 2 ms 8284 KB Output is correct
8 Correct 2 ms 8284 KB Output is correct
9 Correct 2 ms 8284 KB Output is correct
10 Correct 2 ms 8284 KB Output is correct
11 Correct 1 ms 8284 KB Output is correct
12 Correct 2 ms 8284 KB Output is correct
13 Correct 2 ms 8284 KB Output is correct
14 Correct 3 ms 8388 KB Output is correct
15 Correct 2 ms 8284 KB Output is correct
16 Correct 2 ms 8284 KB Output is correct
17 Correct 2 ms 8284 KB Output is correct
18 Correct 2 ms 8284 KB Output is correct
19 Correct 2 ms 8284 KB Output is correct
20 Runtime error 9 ms 17500 KB Execution killed with signal 11
21 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 8280 KB Output is correct
2 Runtime error 9 ms 17500 KB Execution killed with signal 11
3 Halted 0 ms 0 KB -

Subtask #4
0 / 34.0

# Verdict Execution time Memory Grader output
1 Runtime error 16 ms 18644 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #5
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 8280 KB Output is correct
2 Correct 2 ms 8280 KB Output is correct
3 Correct 2 ms 8444 KB Output is correct
4 Correct 2 ms 8284 KB Output is correct
5 Correct 1 ms 8284 KB Output is correct
6 Correct 2 ms 8284 KB Output is correct
7 Correct 2 ms 8284 KB Output is correct
8 Correct 2 ms 8284 KB Output is correct
9 Correct 2 ms 8284 KB Output is correct
10 Correct 2 ms 8284 KB Output is correct
11 Correct 1 ms 8284 KB Output is correct
12 Correct 2 ms 8284 KB Output is correct
13 Correct 2 ms 8284 KB Output is correct
14 Correct 3 ms 8388 KB Output is correct
15 Correct 2 ms 8284 KB Output is correct
16 Correct 2 ms 8284 KB Output is correct
17 Correct 2 ms 8284 KB Output is correct
18 Correct 2 ms 8284 KB Output is correct
19 Correct 2 ms 8284 KB Output is correct
20 Runtime error 9 ms 17500 KB Execution killed with signal 11
21 Halted 0 ms 0 KB -