제출 #902701

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
902701	2024-01-11 00:37:24	KN200711	Fancy Fence (CEOI20_fancyfence)	C++14	100 / 100	49 ms	5948 KiB

fancyfence

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# include <bits/stdc++.h>
# define ll long long
# define ld long double
# define fi first
# define se second
# define pll pair<ll, ll>
# define pdd pair<ld, ld>
# define pii pair<int, int>
using namespace std;
const ll MOD = 1e9 + 7;
int par[100001];
ll sz[100001], ans[100001];
ll C2(int a) {
  ll v = a * (a + 1ll) / 2ll;
  v %= MOD;
  return v;
}
int find(int a) { 
  if(a == par[a]) return a; 
  par[a] = find(par[a]);  
  return par[a];
}
void merge(int a, int b, ll c) {  
  a = find(a);  
  b = find(b);  
  if(a == b) return;  
  ans[a] += ans[b]; 
 
 
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컴파일 시 표준 에러 (stderr) 메시지

fancyfence.cpp: In function 'int main()':
fancyfence.cpp:52:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   52 |  scanf("%d", &N);
      |  ~~~~~^~~~~~~~~~
fancyfence.cpp:56:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   56 |   scanf("%d", &arr[i].fi.fi);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~
fancyfence.cpp:59:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   59 |   scanf("%d", &arr[i].fi.se);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~

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