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답안 #2892

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
2892 2013-08-01T11:24:12 Z kipa00 다각형 (GA5_polygon) C++
100 / 100
 0 ms 1088 KB 
#include <cstdio>

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

int main() {
    int a, b;
    scanf("%d %d", &a, &b);
    printf("%lld\n", sums(b) - sums(a - 1));
    return 0;
}

Subtask #1
60.0 / 60.0

# 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

Subtask #2
10.0 / 10.0

# 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

Subtask #3
30.0 / 30.0

# 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