PE 19 Counting Sundays

#include<iostream>using namespace std;const int a[2][12]={{31,28,31,30,31,30,31,31,30,31,30,31},{31,29,31,30,31,30,31,31,30,31,30,31}};bool leapYear(int n){return (((n%4==0)&&(n%100!=0))||(n%400==0));}bool isSun(int n){return (n%7==0?true:false);}void solve(){int num,i,j,count;count=0;i=1901;num=1;while(i<2000){int t=(leapYear(i)?1:0);for(j=0;j<12;j++){num+=a[t][j];if(isSun(num))count++;}i++;}cout<<count<<endl;}int main(void){solve();return 0;}

Answer:

171