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Submission #105722

# Submission time Handle Problem Language Result Execution time Memory
105722 2019-04-14T05:55:36 Z Pro_ktmr Boat (APIO16_boat) C++14
9 / 100
 16 ms 4268 KB 
#include"bits/stdc++.h"
using namespace std;
#define LL long long
#define REP(i, n) for(int (i)=0; (i)<(n); (i)++)
#define PB push_back
#define MP make_pair
#define MOD 1000000007

int N;
int a[500],b[500];
vector<int> zaatu;

LL dp[500][1001] = {};
LL solve(int now, int bef){
	if(now == N) return 1LL;
	if(dp[now][bef] != 0) return dp[now][bef];
	LL ans = solve(now+1,bef);
	if(zaatu[bef] < a[now]) ans += solve(now+1,lower_bound(zaatu.begin(), zaatu.end(), a[now])-zaatu.begin());
	return dp[now][bef] = ans % MOD;
}

int main(){
	
	scanf("%d", &N);
	for(int i=0; i<N; i++){
		scanf("%d%d", a+i, b+i);
		b[i]++;
		zaatu.PB(a[i]);
		zaatu.PB(b[i]);
	}
	zaatu.PB(0);
	sort(zaatu.begin(), zaatu.end());

	cout << solve(0, 0) - 1 << endl;

}

Compilation message

boat.cpp: In function 'int main()':
boat.cpp:24:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &N);
  ~~~~~^~~~~~~~~~
boat.cpp:26:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", a+i, b+i);
   ~~~~~^~~~~~~~~~~~~~~~~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 4224 KB Output is correct
2 Correct 15 ms 4216 KB Output is correct
3 Correct 15 ms 4268 KB Output is correct
4 Correct 15 ms 4224 KB Output is correct
5 Correct 12 ms 4224 KB Output is correct
6 Correct 15 ms 4088 KB Output is correct
7 Correct 12 ms 4096 KB Output is correct
8 Correct 14 ms 4096 KB Output is correct
9 Correct 15 ms 4172 KB Output is correct
10 Correct 16 ms 4224 KB Output is correct
11 Correct 13 ms 4096 KB Output is correct
12 Correct 11 ms 4224 KB Output is correct
13 Correct 11 ms 4096 KB Output is correct
14 Correct 12 ms 4224 KB Output is correct
15 Correct 12 ms 4096 KB Output is correct
16 Correct 10 ms 4224 KB Output is correct
17 Correct 8 ms 4224 KB Output is correct
18 Correct 8 ms 4224 KB Output is correct
19 Correct 8 ms 4224 KB Output is correct
20 Correct 8 ms 4224 KB Output is correct

Subtask #2
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 4224 KB Output is correct
2 Correct 15 ms 4216 KB Output is correct
3 Correct 15 ms 4268 KB Output is correct
4 Correct 15 ms 4224 KB Output is correct
5 Correct 12 ms 4224 KB Output is correct
6 Correct 15 ms 4088 KB Output is correct
7 Correct 12 ms 4096 KB Output is correct
8 Correct 14 ms 4096 KB Output is correct
9 Correct 15 ms 4172 KB Output is correct
10 Correct 16 ms 4224 KB Output is correct
11 Correct 13 ms 4096 KB Output is correct
12 Correct 11 ms 4224 KB Output is correct
13 Correct 11 ms 4096 KB Output is correct
14 Correct 12 ms 4224 KB Output is correct
15 Correct 12 ms 4096 KB Output is correct
16 Correct 10 ms 4224 KB Output is correct
17 Correct 8 ms 4224 KB Output is correct
18 Correct 8 ms 4224 KB Output is correct
19 Correct 8 ms 4224 KB Output is correct
20 Correct 8 ms 4224 KB Output is correct
21 Incorrect 13 ms 4224 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #3
0 / 27.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 896 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 4224 KB Output is correct
2 Correct 15 ms 4216 KB Output is correct
3 Correct 15 ms 4268 KB Output is correct
4 Correct 15 ms 4224 KB Output is correct
5 Correct 12 ms 4224 KB Output is correct
6 Correct 15 ms 4088 KB Output is correct
7 Correct 12 ms 4096 KB Output is correct
8 Correct 14 ms 4096 KB Output is correct
9 Correct 15 ms 4172 KB Output is correct
10 Correct 16 ms 4224 KB Output is correct
11 Correct 13 ms 4096 KB Output is correct
12 Correct 11 ms 4224 KB Output is correct
13 Correct 11 ms 4096 KB Output is correct
14 Correct 12 ms 4224 KB Output is correct
15 Correct 12 ms 4096 KB Output is correct
16 Correct 10 ms 4224 KB Output is correct
17 Correct 8 ms 4224 KB Output is correct
18 Correct 8 ms 4224 KB Output is correct
19 Correct 8 ms 4224 KB Output is correct
20 Correct 8 ms 4224 KB Output is correct
21 Incorrect 13 ms 4224 KB Output isn't correct
22 Halted 0 ms 0 KB -