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Submission #23587

# Submission time Handle Problem Language Result Execution time Memory
23587 2017-05-12T18:08:25 Z repeating Boat (APIO16_boat) C++11
0 / 100
 246 ms 524288 KB 
#include <bits/stdc++.h>
#define F first
#define S second
#define P push
#define pb push_back
#define MEM(dp,i) memset(dp,i,sizeof(dp))
#define W while
#define R return
#define C continue
#define SI size()
#define ll int
#define pll pair<ll,ll>
#define SF(x) scanf("%I64d",&x)

using namespace std;
const long long INF = 2e9;
long long MOD = 1e9+7;
ll n;
ll a[505];
ll b[505];
vector<ll> dp[505];
ll DP(ll x,ll last){
    if(x==n)R 1;
    if(last>b[x])R DP(x+1,last);
    ll p=DP(x+1,last);
    last=max(last,a[x]);
    ll &ret=dp[x][last-a[x]];
    if(ret!=-1)R ret+p;
    ret=DP(x,last+1);
    ret%=MOD;
    R ret+p;
}
int main(){
    cin>>n;
    for(int i=0;i<n;i++){
        SF(a[i]);
        SF(b[i]);
        for(int j=a[i];j<=b[i];j++)
            dp[i].pb(-1);
    }
    cout<<(DP(0,1)-1)%MOD;
}

Compilation message

boat.cpp: In function 'int main()':
boat.cpp:36:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         SF(a[i]);
                 ^
boat.cpp:37:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         SF(b[i]);
                 ^

Subtask #1
0 / 9.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 2036 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 22.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 2036 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 27.0

# Verdict Execution time Memory Grader output
1 Memory limit exceeded 246 ms 524288 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 42.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 2036 KB Output isn't correct
2 Halted 0 ms 0 KB -