一维

#include<bits/stdc++.h>
using namespace std;

const int N = 1e5 + 10;
int a[N], d[N];

void insert(int l, int r, int c){
    d[l] += c;
    d[r + 1] -= c;

    return ;
}


int main(){
    int n, m;
    cin >> n >> m;

    for(int i = 1; i <= n; ++ i)
        cin >> a[i];

    for(int i = 1; i <= n; ++ i)
        insert(i, i, a[i]);

    while(m --){
        int l, r, c;
        cin >> l >> r >> c;

        insert(l, r, c);
    }

    for(int i = 1; i <= n; ++ i)
        d[i] += d[i - 1];

    for(int i = 1; i <= n; ++ i)
        cout << d[i]  << ' ';

    return 0;
}

二维

#include<bits/stdc++.h>
using namespace std;

const int N = 1010;

int n, m, q;
int a[N][N], d[N][N];


void insert(int x1, int y1, int x2, int y2, int c){
    d[x1][y1] += c;
    d[x2 + 1][y1] -= c;
    d[x1][y2 + 1] -= c;
    d[x2 + 1][y2 + 1] += c; 
    return ;
}



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)
            insert(i, j, i, j, a[i][j]);

    while(q --){
        int x1, x2, y1, y2, c;
        cin >> x1 >> y1 >> x2 >> y2 >> c;
        insert(x1, y1, x2, y2, c);
    }

    for(int i = 1; i <= n; ++ i)
        for(int j = 1; j <= m; ++ j)
            d[i][j] += d[i - 1][j] + d[i][j - 1] - d[i - 1][j - 1];

    for(int i = 1; i <= n; ++ i){
        for(int j = 1; j <= m; ++ j) cout << d[i][j] << ' ';
        puts("");
    }
    return 0;
}