제출 #382662

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
382662	2021-03-28 01:57:50	rainboy	가로등 (APIO19_street_lamps)	C11	100 / 100	969 ms	26252 KiB

street_lamps

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#include <stdio.h>
#include <string.h>
 
#define N 300000
#define Q 300000
#define M (Q * 3)
 
unsigned int X = 12345;
int rand_() {
  return (X *= 3) >> 1;
}
int ft[N], n;
 
void update(int i, int x) {
  while (i < n) {
    ft[i] += x;
    i |= i + 1;
  }
}
 
int query(int i) {
  int x = 0;
 
  while (i >= 0) {
    x += ft[i];
    i &= i + 1, i--;
  }
  return x;
 
 
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컴파일 시 표준 에러 (stderr) 메시지

street_lamps.c: In function 'main':
street_lamps.c:130:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  130 |  scanf("%d%d%s", &n, &q, cc);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~
street_lamps.c:140:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  140 |   scanf("%s", s);
      |   ^~~~~~~~~~~~~~
street_lamps.c:145:4: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  145 |    scanf("%d", &i), i--;
      |    ^~~~~~~~~~~~~~~
street_lamps.c:170:4: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  170 |    scanf("%d%d", &l, &r), l--, r -= 2;
      |    ^~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 20 / 20
• Subtask 5: 20 / 20