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Submission #537059

# Submission time Handle Problem Language Result Execution time Memory
537059 2022-03-14T10:51:52 Z ammar2000 Boat (APIO16_boat) C++17
0 / 100
 2000 ms 9608 KB 
#include<bits/stdc++.h>
#define ll long long
#define pb push_back
#define F first
#define S second
#define coy cout<<"YES\n"
#define con cout<<"NO\n"
#define co1 cout<<"-1\n"
#define sc(x) scanf("%lld",&x)
#define all(x) x.begin(),x.end()
#define fast ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
using namespace std;
const int SI=3e5+7;
ll INF=8e18+7;
int dx[] = {1 , -1 , 0 , 0};
int dy[] = {0 , 0 , 1 , -1};
int MOD=1e9+7;
ll n,a[SI],b[SI];
map <pair <ll,pair<ll,ll> >,ll> dp,vis;
ll solve(int in,int li,int ad)
{
    if (in==n)
    {
        return ad>=0;
    }
    if (vis[{in,{li,ad}}])
        return dp[{in,{li,ad}}];
    vis[{in,{li,ad}}]=1;
    ll ret=0;
    for (int i=0;i+a[in]<=b[in];i++)
    {
        if (a[in]+i>a[li]+ad)
          ret+=solve(in+1,in,i),ret%=MOD;
    }
    ret+=solve(in+1,li,ad);
    return dp[{in,{li,ad}}]=ret%MOD;
}
int main()
{
   fast
   cin>>n;
   for (int i=0;i<n;i++)
    cin>>a[i]>>b[i];
   cout << solve(0,0,-1);
   // use scanf not cin
   return 0;
}

Subtask #1
0 / 9.0

# Verdict Execution time Memory Grader output
1 Incorrect 32 ms 9608 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 22.0

# Verdict Execution time Memory Grader output
1 Incorrect 32 ms 9608 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 27.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2081 ms 212 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 42.0

# Verdict Execution time Memory Grader output
1 Incorrect 32 ms 9608 KB Output isn't correct
2 Halted 0 ms 0 KB -