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Submission #26193

# Submission time Handle Problem Language Result Execution time Memory
26193 2017-06-28T10:04:40 Z Extazy Boat (APIO16_boat) C++14
9 / 100
 2000 ms 7480 KB 
#include <bits/stdc++.h>

using namespace std;

const int N = 517;
const int MOD = (1e9) + 7;

int n,a[N],b[N];
unordered_map < int, int > state[N];

int recurse(int pos, int last) {
    if(pos>n) {
        return ((last!=0) ? 1 : 0);
    }
    if(state[pos].find(last)!=state[pos].end()) {
        return state[pos][last];
    }
    long long ans=recurse(pos+1,last),i;
    for(i=max(last+1,a[pos]);i<=b[pos];i++) {
        ans+=recurse(pos+1,i);
    }
    ans%=MOD;
    state[pos][last]=ans;
    return ans;
}

int main() {
    int i;
    
    scanf("%d", &n);
    for(i=1;i<=n;i++) {
        scanf("%d %d", &a[i], &b[i]);
    }
    printf("%d\n", recurse(1,0));

    return 0;
}

Compilation message

boat.cpp: In function 'int main()':
boat.cpp:30:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
                    ^
boat.cpp:32:37: 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 33 ms 7480 KB Output is correct
2 Correct 39 ms 7480 KB Output is correct
3 Correct 36 ms 7480 KB Output is correct
4 Correct 26 ms 7480 KB Output is correct
5 Correct 39 ms 7480 KB Output is correct
6 Correct 39 ms 7480 KB Output is correct
7 Correct 36 ms 7480 KB Output is correct
8 Correct 26 ms 7480 KB Output is correct
9 Correct 36 ms 7480 KB Output is correct
10 Correct 39 ms 7480 KB Output is correct
11 Correct 36 ms 7480 KB Output is correct
12 Correct 39 ms 7480 KB Output is correct
13 Correct 36 ms 7480 KB Output is correct
14 Correct 46 ms 7480 KB Output is correct
15 Correct 39 ms 7480 KB Output is correct
16 Correct 9 ms 3508 KB Output is correct
17 Correct 9 ms 3640 KB Output is correct
18 Correct 9 ms 3640 KB Output is correct
19 Correct 9 ms 3640 KB Output is correct
20 Correct 3 ms 3508 KB Output is correct

Subtask #2
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 7480 KB Output is correct
2 Correct 39 ms 7480 KB Output is correct
3 Correct 36 ms 7480 KB Output is correct
4 Correct 26 ms 7480 KB Output is correct
5 Correct 39 ms 7480 KB Output is correct
6 Correct 39 ms 7480 KB Output is correct
7 Correct 36 ms 7480 KB Output is correct
8 Correct 26 ms 7480 KB Output is correct
9 Correct 36 ms 7480 KB Output is correct
10 Correct 39 ms 7480 KB Output is correct
11 Correct 36 ms 7480 KB Output is correct
12 Correct 39 ms 7480 KB Output is correct
13 Correct 36 ms 7480 KB Output is correct
14 Correct 46 ms 7480 KB Output is correct
15 Correct 39 ms 7480 KB Output is correct
16 Correct 9 ms 3508 KB Output is correct
17 Correct 9 ms 3640 KB Output is correct
18 Correct 9 ms 3640 KB Output is correct
19 Correct 9 ms 3640 KB Output is correct
20 Correct 3 ms 3508 KB Output is correct
21 Execution timed out 2000 ms 6112 KB Execution timed out
22 Halted 0 ms 0 KB -

Subtask #3
0 / 27.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2000 ms 2056 KB Execution timed out
2 Halted 0 ms 0 KB -

Subtask #4
0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 7480 KB Output is correct
2 Correct 39 ms 7480 KB Output is correct
3 Correct 36 ms 7480 KB Output is correct
4 Correct 26 ms 7480 KB Output is correct
5 Correct 39 ms 7480 KB Output is correct
6 Correct 39 ms 7480 KB Output is correct
7 Correct 36 ms 7480 KB Output is correct
8 Correct 26 ms 7480 KB Output is correct
9 Correct 36 ms 7480 KB Output is correct
10 Correct 39 ms 7480 KB Output is correct
11 Correct 36 ms 7480 KB Output is correct
12 Correct 39 ms 7480 KB Output is correct
13 Correct 36 ms 7480 KB Output is correct
14 Correct 46 ms 7480 KB Output is correct
15 Correct 39 ms 7480 KB Output is correct
16 Correct 9 ms 3508 KB Output is correct
17 Correct 9 ms 3640 KB Output is correct
18 Correct 9 ms 3640 KB Output is correct
19 Correct 9 ms 3640 KB Output is correct
20 Correct 3 ms 3508 KB Output is correct
21 Execution timed out 2000 ms 6112 KB Execution timed out
22 Halted 0 ms 0 KB -