【二维差分】

二维差分

#include
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;
}