제출 #493999

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
493999		Leo121	Rice Hub (IOI11_ricehub)	C++14	컴파일 에러	0 ms	0 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){
        aux += abs((ll) arre[centro] - (ll) arre[i]);
    }
    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){
            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);
}

컴파일 시 표준 에러 (stderr) 메시지

ricehub.cpp: In function 'bool probar(int)':
ricehub.cpp:10:16: error: 'abs' was not declared in this scope
   10 |         aux += abs((ll) arre[centro] - (ll) arre[i]);
      |                ^~~