#include <stdio.h>
long long int a,b;
long long int f(int c){
long long int k = (c*(c+1)/2)*2;
if(k>=2) k-=2;
return k;
}
int main(){
scanf("%lld %lld",&a,&b);
long long int ans = (f(b/2)-f((a-1)/2));
printf("%lld",ans);
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
1088 KB |
Output is correct |
2 |
Correct |
0 ms |
1088 KB |
Output is correct |
3 |
Correct |
0 ms |
1088 KB |
Output is correct |
4 |
Correct |
0 ms |
1088 KB |
Output is correct |
5 |
Correct |
0 ms |
1088 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
1088 KB |
Output is correct |
2 |
Incorrect |
0 ms |
1088 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Halted |
0 ms |
0 KB |
- |