提出 #47695642

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ソースコード 拡げる

// Author: XZC(L_Wave)
// Language: Cpp/G++14
// Problem: F - Colored Ball
// Contest: AtCoder - Ｓｋｙ Inc, Programming Contest 2023（AtCoder Beginner Contest 329）
// URL: https://atcoder.jp/contests/abc329/tasks/abc329_f
// Memory Limit: 1024 MB
// Time Limit: 4000 ms
// Create Time: not 2023-11-18 20:00:34, but 1926-08-17 11:45:14
// 
// Powered by CP Editor (https://cpeditor.org)

#include <bits/stdc++.h>
#define rep(i, a, b) for (int i = (a), i##ABRACADABRA = (b); i <= i##ABRACADABRA; i++)
#define drep(i, a, b) for (int i = (a), i##ABRACADABRA = (b); i >= i##ABRACADABRA; i--)
using namespace std;
using ll = long long;
int ls[10000010],rs[10000010],cnt[10000010],rt[200010],n,q,tot;
void ins(int&p,int l,int r,int x){
  if(!p)p=++tot;
  if(l==r){
    cnt[p]=1;
    return ;
  }
  int mid=(l+r)>>1;
  if(x<=mid)ins(ls[p],l,mid,x);
  else ins(rs[p],mid+1,r,x);
  cnt[p]=cnt[ls[p]]+cnt[rs[p]];
}
int mg(int p,int q,int l,int r){
  if(!p||!q)return p|q;
  if(l==r){
    cnt[p]=1;
    return p;
  }
  int mid=(l+r)>>1;
  ls[p]=mg(ls[p],ls[q],l,mid);
  rs[p]=mg(rs[p],rs[q],mid+1,r);
  cnt[p]=cnt[ls[p]]+cnt[rs[p]];
  return p;
}

int main() {
  scanf("%d%d",&n,&q);
  rep(i,1,n){
    int x;scanf("%d",&x);
    ins(rt[i],1,n,x);
  }
  while(q--){
    int x,y;scanf("%d%d",&x,&y);swap(x,y);
    rt[x]=mg(rt[x],rt[y],1,n);
    rt[y]=0;
    printf("%d\n",cnt[rt[x]]);
  }
  return 0;
}

提出情報

コンパイルエラー

Main.cpp: In function ‘int main()’:
Main.cpp:43:8: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   43 |   scanf("%d%d",&n,&q);
      |   ~~~~~^~~~~~~~~~~~~~
Main.cpp:45:16: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   45 |     int x;scanf("%d",&x);
      |           ~~~~~^~~~~~~~~
Main.cpp:49:18: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   49 |     int x,y;scanf("%d%d",&x,&y);swap(x,y);
      |             ~~~~~^~~~~~~~~~~~~~

ジャッジ結果