?? 1302.cpp
字號:
/* This Code is Submitted by wywcgs for Problem 1302 on 2005-03-27 at 17:31:19 */
#include <stdio.h>
int main()
{
long n, fact[10];
int i, flag;
fact[0] = 1;
for(i = 1; i < 10; i++){
fact[i] = fact[i-1] * i;
}
while(scanf("%ld", &n) == 1){
if(n < 0){
return 0;
}else if(n == 0){
printf("NO\n");
}else{
flag = 1;
for(i = 9; i >= 0; i--){
if(n >= fact[i]){
n -= fact[i];
}
if(n == 0){
printf("YES\n");
flag = 0;
break;
}
}
if(flag == 1){
printf("NO\n");
}
}
}
return 0;
}
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