oj.uz

Submission #7797

# Submission time Handle Problem Language Result Execution time Memory
7797 2014-08-19T10:17:35 Z jackae98 다각형 (GA5_polygon) C++
60 / 100
 0 ms 1088 KB 
#include <stdio.h>
int a,b;
long long int f(int a){
	return (a*(a+1)/2);
}
int main(){
	scanf("%d %d",&a,&b);
	long long int ans = (f(b/2)-f((a-1)/2))*2;
	if(a<=2 && b>=2) ans-=2;
	printf("%lld",ans);
}

Subtask #1
60.0 / 60.0

# Verdict Execution time Memory 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

Subtask #2
0.0 / 10.0

# Verdict Execution time Memory 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 -

Subtask #3
0.0 / 30.0

# Verdict Execution time Memory Grader output
1 Halted 0 ms 0 KB -