Submission #494002

#	Time	Username	Problem	Language	Result	Execution time	Memory
494002		Leo121	Rice Hub (IOI11_ricehub)	C++14	0 / 100	2 ms	332 KiB

ricehub

#include "ricehub.h"
typedef long long ll;
int arre[100002];
ll presupuesto;
int campos;
bool probar(int campos_arroz){
    ll aux = 0;
    int centro = campos_arroz / 2;
    for(int i = 0; i < campos_arroz; ++i){
        ll aux2 = (ll) arre[centro] - (ll) arre[i];
        if(aux2 < 0){
            aux2 *= -1LL;
        }
        aux += aux2;
    }
    if(aux <= presupuesto){
        return 1;
    }
    for(int i = campos_arroz; i < campos; ++i){
        centro++;
        aux -= (ll) arre[centro - 1] - (ll) arre[i - campos_arroz];
        aux += (ll) arre[i] - (ll) arre[centro];
        if(campos_arroz % 2 == 0 && campos_arroz != 2){
            aux -= ((ll) arre[centro] - (ll) arre[centro - 1]);
        }
        if(aux <= presupuesto){
            return 1;
        }
    }
    return 0;
}
int bs(int li, int ls){
    int mitad, resbs = 0;
    while(li <= ls){
        mitad = (li + ls) / 2;
        if(probar(mitad)){
            resbs = mitad;
            li = mitad + 1;
        }
        else{
            ls = mitad - 1;
        }
    }
    return resbs;
}

int besthub(int R, int L, int X[], long long B)
{
    presupuesto = B;
    for(int i = 0; i < R; ++i){
        arre[i] = X[i];
    }
    campos = R;
    return bs(1, R);
}

• Subtask 1: 0 / 17
• Subtask 2: 0 / 25
• Subtask 3: 0 / 26
• Subtask 4: 0 / 32