好端端的被HACK掉了。。。应该是在两端都要补W个0才对,之前只想到要在后面补足0,没想到前面也应该补足,因为前面即便存在0也可能使得移动的积木数最少。。
T_T
#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
#define LL __int64
using namespace std;
LL height[150005];
LL in[150005];
LL out[150005];
LL mint(LL a,LL b){
if(a<b) return a;
return b;
}
LL maxt(LL a,LL b){
if(a>b) return a;
return b;
}
int main(){
LL n,w,h;
while(scanf("%I64d%I64d%I64d",&n,&w,&h)!=EOF){
LL sum=0;
memset(height,0,sizeof(height));
for(LL i=w+1;i<=n+w;i++){
scanf("%I64d",&height[i]);
sum+=height[i];
}
if(sum<w*h) puts("-1");
else{
n=n+w+w;
in[0]=out[0]=0;
LL ans=(1ll<<62);
for(LL i=1;i<=n;i++){
if(height[i]>=h){
out[i]=out[i-1]+height[i]-h;
in[i]=in[i-1];
}
if(height[i]<=h){
in[i]=in[i-1]+h-height[i];
out[i]=out[i-1];
}
if(i-w>=0){
ans=mint(ans,maxt(in[i]-in[i-w],out[i]-out[i-w]));
}
}
printf("%I64d\n",ans);
}
}
return 0;
}