#include<cstdio> #include<iostream> #include<string> #include<cstring> #include<sstream> using namespace std; int fac(int x) { return x>=0 && x<=255; } int main(void) { string line ; while(getline(cin , line)) { char str[100] ,ch , *p=str; int a, b , c ,d , flag = 1; strcpy(str,line.c_str()); while(*p){ if( isalpha(*p) || *p=='-'){ flag = 0 ;break;} p++;} if(flag){ flag = 0 ; stringstream ss(line); ss >> a >> ch>> b>> ch>>c >> ch>> d; if(fac(a) && fac(b) && fac(c) && fac(d)) flag=1; } if(flag) printf("Y\n"); else printf("N\n"); } return 0 ; }
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