01 差分的原理和特点

02 差分的实现

03 例题讲解

#include <bits/stdc++.h>
using namespace std;
const int N  = 1e5 +7;
int arr[N],diff[N];
void solve(int n,int m){for(int i=1;i<=n;i++) cin >> arr[i];for(int i=1;i<=n;i++) diff[i] = arr[i] - arr[i-1];while(m--){int x,y,z;cin >> x >> y >> z;diff[x] += z,diff[y+1] -= z;}for(int i=1;i<=n;i++) arr[i] = arr[i-1] + diff[i];for(int i=1;i<=n;i++) cout << arr[i] << ' ';cout << endl;
}
int main()
{int n,m;while(cin >> n >> m) solve(n,m);return 0;
}