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Submission #2798

# Submission time Handle Problem Language Result Execution time Memory
2798 2013-07-31T11:42:32 Z tncks0121 다각형 (GA5_polygon) C++
100 / 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);
  long long res = f(b)-f(a-1);
  if(a <= 2 && 2 <= b) res -= 2;
    printf("%lld",res);
    return 0;
}

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
10.0 / 10.0

# 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 #3
30.0 / 30.0

# 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