1132A-RegularBracketSequence.cpp

#include <cstdio>

int main(){

    long a, b, c, d; scanf("%ld %ld %ld %ld", &a, &b, &c, &d);
    int ans(1);
    if(a != d){ans = 0;}
    if(c && !a){ans = 0;}
    printf("%d\n", ans);

    return 0;
}