Submission #101104

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
101104	2019-03-16T16:19:54 Z	ansol4328	Rice Hub (IOI11_ricehub)	C++11	Compilation error	0 ms	0 KB

ricehub

#include<stdio.h>

typedef long long ll;

bool pos(int del, long long *m, long long B, int n)
{
    int cnt=n-del;
    int hcnt=cnt/2;
    long long d=0;
    for(int i=0 ; i<cnt/2 ; i++) d+=m[cnt-i+1]-m[i];
    if(d<=B) return true;
    for(int i=0 ; i<n-cnt ; i++)
    {
        int didx=i, aidx=i+cnt;
        d-=m[didx+hcnt]-m[didx];
        d+=m[aidx]-m[aidx-hcnt];
        if(d<=B) return true;
    }
    return false;
}

int besthub(int R, long long L, long long *X, long long B)
{
    int st=0, fn=R, mid, res;
    while(st<=fn)
    {
        mid=(st+fn)>>1;
        if(pos(mid,X,B,R)) fn=mid-1, res=mid;
        else st=mid+1;
    }
    return R-res;
}

Compilation message

ricehub.cpp: In function 'int besthub(int, long long int, long long int*, long long int)':
ricehub.cpp:31:14: warning: 'res' may be used uninitialized in this function [-Wmaybe-uninitialized]
     return R-res;
              ^~~
/tmp/ccbQ4oj1.o: In function `main':
grader.cpp:(.text.startup+0x92): undefined reference to `besthub(int, int, int*, long long)'
collect2: error: ld returned 1 exit status