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delete pics to save space

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happyZYM
2023-08-03 09:22:52 +08:00
commit de60cd6ed4
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8.1218.cpp Normal file
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#include<cstdio>
#include<algorithm>
using namespace std;
int n,R,s[5001][5001];
int main()
{
#ifdef local
freopen("pro.in","r",stdin);
#endif
scanf("%d%d",&n,&R);
for(int i=1;i<=n;i++)
{
int x,y,z; scanf("%d%d%d",&x,&y,&z);
s[x][y]+=z;
}
for(int i=1;i<=5000;i++) s[0][i]+=s[0][i-1];
for(int i=1;i<=5000;i++) s[i][0]+=s[i-1][0];
for(int i=1;i<=5000;i++) for(int j=1;j<=5000;j++) s[i][j]=s[i-1][j]+s[i][j-1]-s[i-1][j-1]+s[i][j];
int res=0;
for(int i=R-1;i<=5000;i++) for(int j=R-1;j<=5000;j++)
if(i==R-1)
if(j==R-1)
res=max(res,s[i][j]);
else
res=max(res,s[i][j]-s[i][j-R]);
else
if(j==R-1)
res=max(res,s[i][j]-s[i-R][j]);
else
res=max(res,s[i][j]-s[i-R][j]-s[i][j-R]+s[i-R][j-R]);
printf("%d\n",res);
return 0;
}