제출 #368362

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
368362		TosakaUCW	Pareto (COCI17_pareto)	C++17	0 / 80	1094 ms	512 KiB

pareto

#include <stdio.h>
#include <algorithm>

int read(int x = 0, int f = 0, char ch = getchar())
{
    while ('0' > ch or ch > '9')
        f = ch == '-', ch = getchar();
    while ('0' <= ch and ch <= '9')
        x = x * 10 + (ch ^ 48), ch = getchar();
    return f ? -x : x;
}

const int N = 3e5 + 5;

int n;
double tot, x, y, sum, a[N];

bool cmp(double a, double b) { return a > b; }

int main()
{
    freopen("pareto.in", "r", stdin), freopen("pareto.out", "w", stdout);
    n = read();
    for (int i = 1; i <= n; i++)
        sum += a[i] = read();
    std::sort(a + 1, a + 1 + n, cmp);
    for (int i = 1; i <= n; i++)
    {
        tot += a[i];
        double nowx = i * 100.0 / n;
        double nowy = tot * 100.0 / sum;
        if (nowy - nowx > y - x)
            x = nowx, y = nowy;
    }
    return printf("%f\n%f", x, y), 0;
}

컴파일 시 표준 에러 (stderr) 메시지

pareto.cpp: In function 'int main()':
pareto.cpp:22:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   22 |     freopen("pareto.in", "r", stdin), freopen("pareto.out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
pareto.cpp:22:46: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   22 |     freopen("pareto.in", "r", stdin), freopen("pareto.out", "w", stdout);
      |                                       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 80