what's wrong ?

#include<bits/stdc++.h>
using namespace std;
int n,i,a[150],k,c,b,f,p;
int main(){
//	freopen("数组清零.in","r",stdin);
//	freopen("数组清零.out","w",stdout);
	cin>>n;
	for(i=1;i<=n;i++){
		cin>>a[i];
	}
	for(i=1;i<=n;i++){
		k=0;c=0;p=0;b=101;
		for(i=1;i<=n;i++){
			if(a[i]==0){
				p++;
			}
			if(b>a[i]&&a[i]!=0){
				b=a[i];
			}
			if(k<=a[i]&&a[i]!=0){
				k=a[i];
				c=i;
			}
		}
		if(p==n){
			break;
		}
		a[c]-=b;f++;
	}
	cout<<f;
    return 0;
}