제출 #467484

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
467484		Khizri	Fountain (eJOI20_fountain)	C++17	60 / 100	106 ms	18660 KiB

fountain

#include <bits/stdc++.h>
using namespace std;
//------------------------------DEFINE------------------------------
//******************************************************************
#define IOS ios_base::sync_with_stdio(false); cin.tie(0),cout.tie(0)
#define ll long long
#define pb push_back		 
#define F first																 
#define S second 															 
#define INF 1e18
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define pii pair<int,int>
#define pll pair<ll,ll>
#define OK cout<<"Ok"<<endl;
#define MOD (ll)(1e9+7)
#define endl "\n"
//******************************************************************
//----------------------------FUNCTION------------------------------
//******************************************************************
ll gcd(ll a,ll b){
	if(a>b) swap(a,b);
	if(a==0) return a+b;
	return gcd(b%a,a);
}
ll lcm(ll a,ll b){
	return a/gcd(a,b)*b;
}
bool is_prime(ll n){
	ll k=sqrt(n);
	if(n==2) return true;
	if(n<2||n%2==0||k*k==n) return false;
	for(int i=3;i<=k;i+=2){
		if(n%i==0){
			return false;
		}
	}
	return true;
}
//*****************************************************************
//--------------------------MAIN-CODE------------------------------
const int mxn=1e5+5;
ll t=1,n,m,x[mxn],y[mxn],d[mxn],k;
ll vtt[mxn];
vector<pll>vt;
pll mp[mxn];
ll idx[mxn];
void dfs(int u){
	mp[u]={k,vt.size()};
	idx[vt.size()]=k;
	if(vt.size()){
		vt.pb({vt[vt.size()-1].F+y[u],u});
	}
	else{
		vt.pb({y[u],u});
	}
	if(vtt[u]!=0){
		dfs(vtt[u]);
	}
}
void solve(){
	scanf("%lld %lld",&n,&m);
	for(int i=1;i<=n;i++){
		scanf("%lld %lld",&x[i],&y[i]);
	}
	priority_queue<pair<pll,ll>,vector<pair<pll,ll>>,greater<pair<pll,ll>>>q;
	for(int i=1;i<=n;i++){
		while(q.size()){
			if(q.top().F.F<x[i]){
				d[i]++;
				vtt[q.top().S]=i;
				q.pop();
			}
			else{
				break;
			}
		}
		q.push({{x[i],y[i]},i});
	}
	for(int i=1;i<=n;i++){
		if(d[i]==0){
			++k;
			dfs(i);
		}
	}
	for(int i=1;i<=m;i++){
		ll a,b;
		scanf("%lld %lld",&a,&b);
		pii p=mp[a];
		ll x=p.F,y=p.S;
		ll sum=0;
		if(y>0){
			sum+=vt[y-1].F;
		}
		pll pp;
		pp.F=sum+b;
		pp.S=0ll;
		auto it=lower_bound(all(vt),pp);
		if(it==vt.end()){
			printf("0\n");
		}
		else{
			int ind=(it-vt.begin());
			if(ind<0||ind>=vt.size()||idx[ind]!=x){
				printf("0\n");
			}
			else{
				ll ans=vt[ind].S;
				printf("%lld\n",ans);
			}
		}
	}
}
int main(){
	//IOS;
	//cin>>t;
	while(t--){
		solve();
	}
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

fountain.cpp: In function 'void solve()':
fountain.cpp:104:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  104 |    if(ind<0||ind>=vt.size()||idx[ind]!=x){
      |              ~~~^~~~~~~~~~~
fountain.cpp:62:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   62 |  scanf("%lld %lld",&n,&m);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~
fountain.cpp:64:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   64 |   scanf("%lld %lld",&x[i],&y[i]);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
fountain.cpp:88:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   88 |   scanf("%lld %lld",&a,&b);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~

• Subtask 1: 30 / 30
• Subtask 2: 30 / 30
• Subtask 3: 0 / 40