제출 #2904

#제출 시각아이디문제언어결과실행 시간메모리
2904jihoon다각형 (GA5_polygon)C++98
60 / 100
0 ms1088 KiB
#include<stdio.h>
int main(){
    int a,b;
    long long int gaji=1;
    scanf("%d %d",&a,&b);
    if(a==2) a=4;
    if(b<=3) {printf("0");return 0;}
    if(a%2) a++;
    if(b%2) b--;
    gaji=gaji*((b-a)/2+1);
    gaji=gaji*((a+b)/2);
    printf("%lld",gaji);
    return 0;
}
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