先上题解吧。(仅个人思路,还望各位大佬指教。真-小白)#include <iostream>#include <cstdio>using namespace std;int main(){ long long n,count=0; scanf("%ld",&n); if(n%4==0) cout<<n/42; else if(n%4==1) cout<<n/42+1; else if(n%4==2) cout<<n/42+2; else if...