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Submission #362521

# Submission time Handle Problem Language Result Execution time Memory
362521 2021-02-03T14:16:21 Z flappybird Boat (APIO16_boat) C++14
0 / 100
 1357 ms 524292 KB 
#include <bits/stdc++.h>
using namespace std;
#define MAX 510
#define all(v) v.begin(), v.end()
#define ln '\n'
#define MOD 1000000007
#define INF 210000000000
#define pb push_back
#define abs(x) (((x)>0)?(x):(-(x)))
#define len(x) ((x).second-(x).first)
typedef long long ll;
vector<int> dp[MAX], sum[MAX];
int A[MAX], B[MAX];
int main(void) {
	ios::sync_with_stdio(false);
	cin.tie(0);
	int N;
	cin >> N;
	int i, j, k;
	for (i = 1; i <= N; i++) cin >> A[i] >> B[i], dp[i].pb(0), sum[i].pb(0);
	for (i = A[1]; i <= B[1]; i++) {
		dp[1].pb(1);
		sum[1].pb(0);
		sum[1][i - A[1] + 1] = (sum[1][i - A[1]] + dp[1][i - A[1] + 1]) % MOD;
	}
	for (i = 2; i <= N; i++) {
		for (j = A[i]; j <= B[i]; j++) dp[i].pb(1), sum[i].pb(0);
		for (j = A[i]; j <= B[i]; j++) {
			for (k = 1; k <= N - 1; k++) {
				if (j - A[k] <= 0) continue;
				dp[i][j - A[i] + 1] += sum[k][min(j - A[k], (int)(sum[k].size() - 1))];
				dp[i][j - A[i] + 1] %= MOD;
			}
		}
		for (j = A[i]; j <= B[i]; j++) sum[i][j - A[i] + 1] = (sum[i][j - A[i]] + dp[i][j - A[i] + 1]) % MOD;
	}
	int ans = 0;
	for (i = 1; i <= N; i++) ans += sum[i][sum[i].size() - 1];
	ans %= MOD;
	while (ans < 0) ans += MOD;
	cout << ans << ln;
	return 0;
}

Subtask #1
0 / 9.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 364 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 22.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 364 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 27.0

# Verdict Execution time Memory Grader output
1 Runtime error 1357 ms 524292 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #4
0 / 42.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 364 KB Output isn't correct
2 Halted 0 ms 0 KB -