CODE FESTIVAL 2016 Final

Submission #1152855

Source codeソースコード

#include <bits/stdc++.h>
using namespace std;

const int N = 1E5 + 10;

int n, m;
int _pair[N], mod[N], a[N];

int main() {
  scanf("%d%d", &n, &m);
  for (int i = 1; i <= n; i++) {
    scanf("%d", a + i);
    mod[a[i] % m]++;
  }
  sort(a + 1, a + 1 + n);
  for (int i = 1; i <= n; i++) {
    int pt = i;
    while (a[pt] == a[i] && pt <= n) pt++;
    _pair[a[i] % m] += (pt - i) / 2;
    i = pt - 1;
  }
  int ans = 0;
  for (int i = 0; i < m; i++) {
    if (i > m - i) break;
    int u = mod[i] - _pair[i] * 2, v = mod[m - i] - _pair[m - i] * 2;
    if (i == m - i || i == 0) {
      ans += _pair[i] + u / 2;
    } else {
      int mu = mod[i], mv = mod[m - i];
      if (u < v) swap(u, v), swap(mu, mv);
      ans += v + min(u - v, mv - v) + (mv - v - min(u - v, mv - v)) / 2 + (mu - u) / 2;
    }
  }
  printf("%d\n", ans);
  return 0;
}

Submission

Task問題 D - Pair Cards
User nameユーザ名 kakapo95
Created time投稿日時
Language言語 C++14 (GCC 5.4.1)
Status状態 AC
Score得点 700
Source lengthソースコード長 877 Byte
File nameファイル名
Exec time実行時間 19 ms
Memory usageメモリ使用量 1408 KB

Compiler messageコンパイルメッセージ

./Main.cpp: In function ‘int main()’:
./Main.cpp:10:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d", &n, &m);
^
./Main.cpp:12:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", a + i);
^

Test case

Set

Set name Score得点 / Max score Cases
sample - sample-01.txt,sample-02.txt
all 700 / 700 sample-01.txt,sample-02.txt,01-01.txt,01-02.txt,01-03.txt,01-04.txt,01-05.txt,01-06.txt,01-07.txt,01-08.txt,01-09.txt,01-10.txt,01-11.txt,01-12.txt,01-13.txt,01-14.txt,01-15.txt,01-16.txt,01-17.txt,01-18.txt,01-19.txt,01-20.txt,01-21.txt,01-22.txt,01-23.txt,01-24.txt,01-25.txt,01-26.txt,01-27.txt,01-28.txt,01-29.txt,01-30.txt,sample-01.txt,sample-02.txt

Test case

Case name Status状態 Exec time実行時間 Memory usageメモリ使用量
01-01.txt AC 1 ms 256 KB
01-02.txt AC 17 ms 640 KB
01-03.txt AC 18 ms 640 KB
01-04.txt AC 17 ms 640 KB
01-05.txt AC 17 ms 640 KB
01-06.txt AC 18 ms 640 KB
01-07.txt AC 18 ms 640 KB
01-08.txt AC 17 ms 640 KB
01-09.txt AC 17 ms 640 KB
01-10.txt AC 18 ms 896 KB
01-11.txt AC 19 ms 1408 KB
01-12.txt AC 12 ms 640 KB
01-13.txt AC 12 ms 640 KB
01-14.txt AC 17 ms 640 KB
01-15.txt AC 17 ms 640 KB
01-16.txt AC 17 ms 640 KB
01-17.txt AC 17 ms 640 KB
01-18.txt AC 17 ms 640 KB
01-19.txt AC 17 ms 768 KB
01-20.txt AC 19 ms 1408 KB
01-21.txt AC 16 ms 640 KB
01-22.txt AC 16 ms 640 KB
01-23.txt AC 16 ms 640 KB
01-24.txt AC 16 ms 640 KB
01-25.txt AC 16 ms 896 KB
01-26.txt AC 17 ms 1408 KB
01-27.txt AC 10 ms 896 KB
01-28.txt AC 2 ms 1024 KB
01-29.txt AC 2 ms 512 KB
01-30.txt AC 2 ms 384 KB
sample-01.txt AC 1 ms 256 KB
sample-02.txt AC 1 ms 256 KB