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Submission #69274

# Submission time Handle Problem Language Result Execution time Memory
69274 2018-08-20T11:00:47 Z FedericoS Boat (APIO16_boat) C++14
0 / 100
 2000 ms 164016 KB 
#include <iostream>
#include <map>
using namespace std;
typedef long long int ll;
typedef pair<ll,ll> pll;

ll M=1000000007;
int N;
ll X[505],Y[505];
map<ll,ll> S;
map<pll,ll> DP;
ll ans;
map<ll,ll> R;

ll somma(ll a){
	ll res=0;
	for(ll i=a;i<10000;i++)
		res=(res+R[i])%M;
	return res;
}

void aggiungi(ll a, ll b){
	R[a]=(R[a]+b)%M;
}

int main(){

	cin>>N;
	for(int i=0;i<N;i++)
		cin>>X[i]>>Y[i];

	for(int i=N-1;i>=0;i--)
		for(ll j=X[i];j<=Y[i];j++){
			DP[{i,j}]=(somma(j+1)+1)%M;
			aggiungi(j,DP[{i,j}]);
			//cout<<i<<" "<<j<<" "<<DP[{i,j}]<<endl;
		}

	//for(int i=0;i<10;i++)cout<<i<<" "<<S[i]<<endl;

	for(int i=0;i<N;i++)
		ans=(ans+DP[{i,X[i]}])%M;
	cout<<ans;

}
/*
3
1 1
2 2
3 3
*/

Subtask #1
0 / 9.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 376 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 22.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 376 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 2073 ms 164016 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 42.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 376 KB Output isn't correct
2 Halted 0 ms 0 KB -