@[caox0427](/user/886310) b[i]==2 ???
by Gohidg @ 2023-07-12 11:54:51
改成b[i]=2
by Gohidg @ 2023-07-12 11:55:59
还有一点
by ILoveSoviet @ 2023-07-12 11:56:57
你的第二个循环（j那个）的判断式写的是i<n,估计就应此RE了
by ILoveSoviet @ 2023-07-12 11:58:02
```
#include<bits/stdc++.h>
using namespace std;
int n,cnt;
int main(){
int a[10005] = {0},b[10005] = {0};
cin>>n;
for(int i = 0;i<n;i++){
cin>>a[i];
b[i] ==2;
}
for(int i = 0;i<n;i++){
for(int j = i+1;j<n;j++){
for(int z = 0;z<n;z++){
if(a[i]+a[j] == a[z]&&b[z] == 2){
cnt++;
b[z] = 1;
}
}
}
}
cout<<cnt;
return 0;
}
```
by xu222ux @ 2023-07-12 12:00:54
不止，不是b[i]=1;是b[z]
by xu222ux @ 2023-07-12 12:02:34
帮你调好了，拿走不谢：
```cpp
#include<bits/stdc++.h>
using namespace std;
int n,cnt;
int main(){
int a[10005] = {0},b[10005] = {0};
cin>>n;
// cout<<n;
for(int i = 0;i<n;i++){
cin>>a[i];
b[i] = 2;
}
for(int i = 0;i<n;i++){
for(int j = i+1;j<n;j++){
for(int z = 0;z<n;z++){
// cout<<i<<" "<<j<<" "<<z<<endl;
// system("PAUSE");
if(a[i]+a[j] == a[z]&&b[z] == 2){
cnt++;
// cout<<i<<" "<<j<<endl;
b[z] = 1;
}
}
}
}
cout<<cnt;
return 0;
}
```
by ILoveSoviet @ 2023-07-12 12:03:05
@[ILoveSoviet](/user/724221) 谢谢了
by Ghost_Death @ 2023-07-16 17:56:40
##### G
```cpp
#include <bits/stdc++.h>
using namespace std;
#define ll long long
bool l[100001];
ll dfs(vector<int> arr, int n)
{
ll ans = 0;
for (int i = 0; i < n; ++i) {
for (int j = 0; j < n; ++j) {
for (int k = 0; k < n && k != j; ++k)
if ((arr[i] == (arr[j] + arr[k])) && l[arr[i]] == 0) {
l[arr[i]] = 1;
ans++;
//cout << ans << "1!!" << endl;
}
}
//cout << i << " " << j << " " << k << endl;
}
return ans;
}
int main() {
int n;
vector<int> arr;
cin >> n;
for (int i = 0; i < n; ++i)
{
int temp;
cin >> temp;
arr.push_back(temp);
}
bool flag = 0;
ll ans = dfs(arr, n);
cout << ans << endl;
return 0;
}
```
by 13704085069a @ 2023-07-17 14:52:50