Submission #20884

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
20884	2017-03-04 15:48:01	14kg	동전 게임 (KOI15_coin)	C++11	100 / 100	39 ms	1116 KiB

coin

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#include <stdio.h>
#define max2(x,y) (x>y?x:y)
int n;
bool f(int x, int y, int mx) {
  int turn = n - max2(x, y);
  
  if (x + turn - mx < y) return false;
  if (y + turn + mx < x) return false;
  return true;
}
int main() {
  int k, x, y;
  bool check;
  scanf("%d %d", &n, &k);
  while (k--) {
    scanf("%d %d", &x, &y), check = false;
    if (x > 0 && f(x - 1, y, 0)) check = true;
    if (y > 0 && f(x, y - 1, 1)) check = true;
    if (x + y == 0) check = true;
    printf("%d\n", check);
  }
}
 
 
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Compilation message (stderr)

coin.cpp: In function 'int main()':
coin.cpp:17:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &n, &k);
                        ^
coin.cpp:19:40: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d", &x, &y), check = false;
                                        ^

• Subtask 1: 9 / 9
• Subtask 2: 19 / 19
• Subtask 3: 21 / 21
• Subtask 4: 51 / 51