이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <bits/stdc++.h>
using namespace std;
#define sf scanf
#define pf printf
#define fi first
#define se second
#define pb emplace_back
#define sz(x) (int)x.size()
#define INF 1023456789
#define LINF 1023456789123456789
#define all(x) x.begin(), x.end()
typedef long long ll;
typedef long double ld;
typedef pair<int, int> ii;
typedef pair<ll, ll> pll;
typedef tuple<int, int, int> iii;
typedef tuple<int, int, int, int> iiii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<pll> vll;
mt19937 rng(time(0));
#define maxn 500005
int n,c[maxn],b,t,q,x,y,cl[maxn],cr[maxn],l[maxn],r[maxn];
vi v[maxn];
bool can(int x,int l,int r){
//current range is [l,r], can u travel through door x
int pos=lower_bound(all(v[c[x]]),l)-v[c[x]].begin();
if(pos==sz(v[c[x]])||v[c[x]][pos]>r)return false;
return true;
}
ii thing(int l,int r){
if(l>1&&can(l-1,l,r))return thing(cl[l-1],r);
if(r<n&&can(r,l,r))return thing(l,cr[r+1]);
return ii(l,r);
}
int main(){
sf("%d",&n);
for(int i=1;i<n;++i)sf("%d",&c[i]);
for(int i=1;i<=n;++i){
sf("%d",&b);
for(int j=0;j<b;++j){
sf("%d",&t);
v[t].pb(i);
}
}
for(int i=1;i<=n;++i){
cl[i]=i;
while(1<cl[i]&&can(cl[i]-1,cl[i],i))cl[i]=cl[cl[i]-1];
}
for(int i=n;i>=1;--i){
cr[i]=i;
while(cr[i]<n&&can(cr[i],i,cr[i]))cr[i]=cr[cr[i]+1];
}
for(int i=1;i<=n;++i){
if(i>1&&can(i-1,i,cr[i])){
l[i]=l[i-1];
r[i]=max(r[i-1],cr[i]);
}
else{
l[i]=cl[i];r[i]=cr[i];
}
tie(l[i],r[i])=thing(l[i],r[i]);
}
sf("%d",&q);
while(q--){
sf("%d%d",&x,&y);
if(l[x]<=y&&y<=r[x])pf("YES\n");
else pf("NO\n");
}
}
컴파일 시 표준 에러 (stderr) 메시지
long_mansion.cpp: In function 'int main()':
long_mansion.cpp:43:4: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
43 | sf("%d",&n);
| ^
long_mansion.cpp:44:24: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
44 | for(int i=1;i<n;++i)sf("%d",&c[i]);
| ^
long_mansion.cpp:46:5: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
46 | sf("%d",&b);
| ^
long_mansion.cpp:48:6: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
48 | sf("%d",&t);
| ^
long_mansion.cpp:70:4: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
70 | sf("%d",&q);
| ^
long_mansion.cpp:72:5: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
72 | sf("%d%d",&x,&y);
| ^
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