제출 #875445

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
875445		imarn	Vudu (COCI15_vudu)	C++14	140 / 140	174 ms	15964 KiB

vudu

#include<stdio.h>
#define ll long long
using namespace std;
const int N=1e6+5;
ll a[N]{0};
ll cnt=0;
void dac(int l,int r){
    if(l>=r)return;
    int m=(l+r)>>1;
    dac(l,m);dac(m+1,r);
    int sz1=m-l+1,sz2=r-m;
    ll le[sz1],re[sz2];
    for(int i=0;i<sz1;i++)le[i]=a[i+l];
    for(int i=0;i<sz2;i++)re[i]=a[m+1+i];
    int li=0,ri=0,mi=l;
    while(li<sz1&&ri<sz2){
        if(le[li]<=re[ri])cnt+=sz2-ri,a[mi++]=le[li++];
        else a[mi++]=re[ri++];
    }while(li<sz1)a[mi++]=le[li++];
    while(ri<sz2)a[mi++]=re[ri++];
}
int main(){
    int n;scanf("%d",&n);
    for(int i=1;i<=n;i++)scanf("%lld",&a[i]);
    ll p;scanf("%lld",&p);
    for(int i=1;i<=n;i++)a[i]+=a[i-1]-p;
    dac(0,n);printf("%lld",cnt);
}

컴파일 시 표준 에러 (stderr) 메시지

vudu.cpp: In function 'int main()':
vudu.cpp:23:16: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |     int n;scanf("%d",&n);
      |           ~~~~~^~~~~~~~~
vudu.cpp:24:31: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |     for(int i=1;i<=n;i++)scanf("%lld",&a[i]);
      |                          ~~~~~^~~~~~~~~~~~~~
vudu.cpp:25:15: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 |     ll p;scanf("%lld",&p);
      |          ~~~~~^~~~~~~~~~~

• Subtask 1: 140 / 140