Submission #433877

#	Time	Username	Problem	Language	Result	Execution time	Memory
433877		oscar1f	Boat (APIO16_boat)	C++17	9 / 100	2101 ms	524292 KiB

boat

#include<bits/stdc++.h>
using namespace std;

const int MAX_ECOLE=501,INFINI=1000*1000*1000+7;
int nbEcole;
map<long long,int> memo;
int mini[MAX_ECOLE],maxi[MAX_ECOLE];

int dyna(int idEcole,int maxMaint) {
    if (idEcole==nbEcole+1) {
        return 1;
    }
    if (maxMaint<mini[idEcole]) {
        return memo[(long long)idEcole*(long long)INFINI+(long long)maxMaint]=(dyna(idEcole+1,maxMaint)+dyna(idEcole,mini[idEcole]))%INFINI;
    }
    int val=memo[(long long)idEcole*(long long)INFINI+(long long)maxMaint];
    if (val!=0) {
        return val;
    }
    val=dyna(idEcole+1,maxMaint);
    if (maxMaint<maxi[idEcole]) {
        val+=dyna(idEcole,maxMaint+1);
        val%=INFINI;
    }
    memo[(long long)idEcole*(long long)INFINI+(long long)maxMaint]=val;
    return val;
}

int main() {
	ios_base::sync_with_stdio(false);
    cin>>nbEcole;
    for (int i=1;i<=nbEcole;i++) {
        cin>>mini[i]>>maxi[i];
    }
    cout<<(dyna(1,-1)+INFINI-1)%INFINI<<endl;
}

• Subtask 1: 9 / 9
• Subtask 2: 0 / 22
• Subtask 3: 0 / 27
• Subtask 4: 0 / 42