CodeForces 110A Nearly Lucky Number (近似幸运数字)
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#include <iostream>
#include <algorithm>
#include <stdio.h>
#include <string>
#include <string.h>
using namespace std;
int main()
{
char a[20];
while(scanf("%s",a)!=EOF){
int len=strlen(a);
int l=0,t;
for(int i=0;i<len;i++){
if(a[i]=='4'||a[i]=='7')
l++;
}
if(l%4==0||l%7==0) cout<<"YES"<<endl;
else cout<<"NO"<<endl;
}
return 0;
}
#include <algorithm>
#include <stdio.h>
#include <string>
#include <string.h>
using namespace std;
int main()
{
char a[20];
while(scanf("%s",a)!=EOF){
int len=strlen(a);
int l=0,t;
for(int i=0;i<len;i++){
if(a[i]=='4'||a[i]=='7')
l++;
}
if(l%4==0||l%7==0) cout<<"YES"<<endl;
else cout<<"NO"<<endl;
}
return 0;
}
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