题解 | #记负均正II#

#include <iomanip>
#include <iostream>
#include <vector>
using namespace std;

int main() {
    int n;
    vector<float> v;
    while(cin >> n){
        v.push_back(n);
    }

    int minusCnt = 0, positiveCnt = 0;
    float sum = 0;
    for(auto i : v){
        if(i < 0){
            minusCnt++;
        }else if( i > 0){
            positiveCnt++;
            sum += i;
        }
    }
    float ave = 0.0;
    if(positiveCnt > 0){
        ave = sum / positiveCnt;
    }
    cout << minusCnt << endl;
    cout << fixed << setprecision(1) << ave << endl;
}
// 64 位输出请用 printf("%lld")