#include<cstdio> #include<iostream> #include<cmath> using namespace std; int main(){ int a,b; double c=0.0; cin>>a; for(int i=1;i<=a;i++){ cin>>b; if(b<=70)c=c+0.1; else { while(1){ b-=70; c=c+0.1; if(b<0)break; } } } cout<<c; return 0; }

注：没流量电话卡无话费

#include<bits/stdc++.h> using namespace std; int main(){ int a; double c=0; cin>>a; for(int i=1;i<=a;i++){ int b; cin>>b; if(b<=70){ c+=0.1; } else{ while(b>=0){ c+=0.1; b-=70; } } } cout<<c; return 0; }

挑战不用iostream。