二维差分

#include<iostream>
using namespace std;
const int N = 1000+11;int n,m,q;int a[N][N],b[N][N];int main(){cin>>n>>m>>q;for(int i=1;i<=n;i++)for(int j=1;j<=m;j++)cin>>a[i][j];for(int i=1;i<=n;i++)for(int j=1;j<=m;j++)b[i][j] = a[i][j] - a[i-1][j] -a[i][j-1] + a[i-1][j-1];while(q--){int x1,y1,x2,y2,c;cin>>x1>>y1>>x2>>y2>>c;b[x1][y1]+=c;b[x2+1][y1]-=c;b[x1][y2+1]-=c;b[x2+1][y2+1]+=c;}for(int i=1;i<=n;i++)for(int j=1;j<=m;j++)a[i][j] = b[i][j] + a[i-1][j] + a[i][j-1] - a[i-1][j-1];for(int i=1;i<=n;i++){for(int j=1;j<=m;j++){cout<<a[i][j]<<" ";}cout<<endl;}return 0;
}