oj.uz

Submission #2788

# Submission time Handle Problem Language Result Execution time Memory
2788 2013-07-31T10:29:53 Z kk1401 다각형 (GA5_polygon) C++
0 / 100
 0 ms 1088 KB 
#include<stdio.h>

long long f(long long k)
{
    if(k%2ll==1ll) k--;
    int kk=k/2ll;
    return kk*(kk+1ll);
}

int main()
{
    long long a,b;
    scanf("%lld%lld",&a,&b);
    printf("%lld",f(b)-f(a-1));
    return 0;
}

Subtask #1
0.0 / 60.0

# 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 #2
0.0 / 10.0

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

Subtask #3
0.0 / 30.0

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