哪个大佬能帮弟弟看看，哪里有错

#include<iostream>
#include<cstring>
using namespace std;
const unsigned int M = 1000;
int tower[M]; 
int main()
{
    memset(tower,0,sizeof(tower));
    int n;
//    while(cin>>n)
//    {
    cin>>n;
        memset(tower,0,sizeof(tower));
    for(int i = 1 ;i <= n;i++)
    {
        cin>>tower[i];
            }
    int m;
    cin >> m;
    for(int j = 1 ;j <= m ;j++)
    {
        int a,b,c;
        cin>>a>>b>>c;
        if(1<= a&&a<=b&&b<=n)
        if(a == b){
        tower[a]+=c;
//        tower[b]+=c;
    }
    else
    {
        tower[a]+=c;
        tower[b]+=c;
    }
            }

    for(int k = 1 ;k <= n;k++)
    {
        if(k == n) cout<<tower[k]<<endl;
        else cout<<tower[k]<<' ';
            }
        
            
            return 0;
}