oj.uz

Submission #126415

# Submission time Handle Problem Language Result Execution time Memory
126415 2019-07-07T16:25:26 Z shafinalam Boat (APIO16_boat) C++14
9 / 100
 4 ms 380 KB 
#include <bits/stdc++.h>

using namespace std;
const int mxn = 1e5+5;
const int mod = 1e9+7;
typedef long long ll;
typedef pair<int,int>pii;
#define ff first
#define ss second

pii arr[mxn];
int dp[505];
int n;

int solve(int pos)
{
    if(pos>=n) return 0;
    if(dp[pos]!=-1) return dp[pos];

    int ret = 0;
    for(int i = pos+1; i <= n; i++)
        if(arr[i].ff>arr[pos].ff) ret = (ret+solve(i)+1)%mod;
    return dp[pos] = ret%mod;
}
int main()
{
    scanf("%d", &n);

    for(int i = 1; i <= n; i++)
    {
        int a, b;
        scanf("%d%d", &a, &b);
        arr[i] = make_pair(a, b);
    }
    memset(dp, -1, sizeof dp);
    int ans = solve(0)%mod;
    printf("%d\n", ans);
    return 0;
}

Compilation message

boat.cpp: In function 'int main()':
boat.cpp:27:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
     ~~~~~^~~~~~~~~~
boat.cpp:32:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d", &a, &b);
         ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 256 KB Output is correct
2 Correct 3 ms 376 KB Output is correct
3 Correct 3 ms 376 KB Output is correct
4 Correct 3 ms 376 KB Output is correct
5 Correct 3 ms 380 KB Output is correct
6 Correct 3 ms 376 KB Output is correct
7 Correct 4 ms 376 KB Output is correct
8 Correct 3 ms 376 KB Output is correct
9 Correct 3 ms 376 KB Output is correct
10 Correct 3 ms 376 KB Output is correct
11 Correct 3 ms 376 KB Output is correct
12 Correct 3 ms 376 KB Output is correct
13 Correct 3 ms 376 KB Output is correct
14 Correct 3 ms 376 KB Output is correct
15 Correct 3 ms 376 KB Output is correct
16 Correct 3 ms 376 KB Output is correct
17 Correct 3 ms 376 KB Output is correct
18 Correct 3 ms 376 KB Output is correct
19 Correct 3 ms 376 KB Output is correct
20 Correct 3 ms 380 KB Output is correct

Subtask #2
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 256 KB Output is correct
2 Correct 3 ms 376 KB Output is correct
3 Correct 3 ms 376 KB Output is correct
4 Correct 3 ms 376 KB Output is correct
5 Correct 3 ms 380 KB Output is correct
6 Correct 3 ms 376 KB Output is correct
7 Correct 4 ms 376 KB Output is correct
8 Correct 3 ms 376 KB Output is correct
9 Correct 3 ms 376 KB Output is correct
10 Correct 3 ms 376 KB Output is correct
11 Correct 3 ms 376 KB Output is correct
12 Correct 3 ms 376 KB Output is correct
13 Correct 3 ms 376 KB Output is correct
14 Correct 3 ms 376 KB Output is correct
15 Correct 3 ms 376 KB Output is correct
16 Correct 3 ms 376 KB Output is correct
17 Correct 3 ms 376 KB Output is correct
18 Correct 3 ms 376 KB Output is correct
19 Correct 3 ms 376 KB Output is correct
20 Correct 3 ms 380 KB Output is correct
21 Incorrect 3 ms 376 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #3
0 / 27.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 256 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 256 KB Output is correct
2 Correct 3 ms 376 KB Output is correct
3 Correct 3 ms 376 KB Output is correct
4 Correct 3 ms 376 KB Output is correct
5 Correct 3 ms 380 KB Output is correct
6 Correct 3 ms 376 KB Output is correct
7 Correct 4 ms 376 KB Output is correct
8 Correct 3 ms 376 KB Output is correct
9 Correct 3 ms 376 KB Output is correct
10 Correct 3 ms 376 KB Output is correct
11 Correct 3 ms 376 KB Output is correct
12 Correct 3 ms 376 KB Output is correct
13 Correct 3 ms 376 KB Output is correct
14 Correct 3 ms 376 KB Output is correct
15 Correct 3 ms 376 KB Output is correct
16 Correct 3 ms 376 KB Output is correct
17 Correct 3 ms 376 KB Output is correct
18 Correct 3 ms 376 KB Output is correct
19 Correct 3 ms 376 KB Output is correct
20 Correct 3 ms 380 KB Output is correct
21 Incorrect 3 ms 376 KB Output isn't correct
22 Halted 0 ms 0 KB -