摘要：#include <stdio.h> int main() { int c1,c2; scanf("%d%d",&c1,&c2); int r=c2-c1; if(r%100>=50){ r=r/100+1; }else{ r=r/100; } printf("%02d:%02d:%02d",r/3 阅读全文

摘要：#include <stdio.h> int main() { long long a,b,i,j,i1,j1; scanf("%lld%lld%lld%lld",&a,&i,&b,&j); i1=0,j1=0; while (a){ if(a%10==i){ i1=i1*10+i; } a/=10 阅读全文

摘要：//（3n+1）猜想#include<stdio.h> int main() { int n,i=0; scanf("%d",&n); while(n!=1){ if(n%2==0){ n/=2; i++; } else{ n=(3*n+1)/2; i++; } } printf("%d",i); 阅读全文