#include <iostream> using namespace std; int main() { int total; while (cin >> total) { // 注意 while 处理多个 case int a = total; int i = a/7; a = a-i*7; if(a==3&&total>3) {i-=1;a=10;} if(a==4&&total>4) {i-=1;a=11;} int j = a/5; a = a-j*5; int k = a; cout<<i+j+k<...
