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Submission #2889

# Submission time Handle Problem Language Result Execution time Memory
2889 2013-08-01T11:16:17 Z tncks0121 다각형 (GA5_polygon) C++
0 / 100
 0 ms 1088 KB 
#include <cstdio>

long long int sums(int c) {
    long long int res = c / 2;
    res *= (res + 1);
    return res;
}

int main() {
    int a, b;
    long long int res;
    scanf("%d %d", &a, &b);
    res = sums(b) - sums(a-1);
    if (a < 2 && b >= 2) {
        res -= 2;
    }
    printf("%lld\n", res);
    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 -