Submission #375408

#	Time	Username	Problem	Language	Result	Execution time	Memory
375408		muhi1112	Po (COCI21_po)	C++17	20 / 70	1121 ms	524292 KiB

Main

#include <bits/stdc++.h>
using namespace std;

#define f1 first
#define s2 second
#define INF 1e9+10
#define ll long long
#define pb push_back
#define fri(a) freopen(a,"r",stdin)
#define fro(a) freopen(a,"w",stdout)
const int N=2e5+5;

int n,dizi[N],t[4*N];
map<int,vector<int>>mp;

void build(int v,int tl,int tr){
	if(tl==tr)t[v]=dizi[tl];
	else{
		int tm=(tl+tr)/2;
		build(v*2,tl,tm);
		build(v*2+1,tm+1,tr);
		t[v]=min(t[v*2],t[v*2+1]);
	}
}
ll getmin(int v,int tl,int tr,int l,int r){
	if(l>r)return INF;
	if(l==tl && r==tr)return t[v];
	int tm=(tl+tr)/2;
	return min(getmin(v*2,tl,tm,l,min(r,tm)),getmin(v*2+1,tm+1,tr,max(l,tm+1),r));
}

int solve(int l,int r){
	//cout<<l<<" "<<r<<endl;
	if(l>r)return 0;
	if(l+1==r-1)return 1;
	if(l+1==r)return 0;
	int x=getmin(1,1,n+1,l+1,r-1);
	//cout<<x<<endl;
	int a=solve(l,mp[x][0])+solve(mp[x][mp[x].size()-1],r)+1;
	for(int i=1;i<mp[x].size();i++){
		a+=solve(mp[x][i-1],mp[x][i]);
		//cout<<"sa"<<endl;
	}
	return a;
}

int main(){

	//fri("in.txt");
	//fro("out.txt");
	cin>>n;
	for(int i=1;i<=n;i++){
		cin>>dizi[i];
		mp[dizi[i]].pb(i);
	}
	build(1,1,n+1);
	cout<<solve(0,n+1)<<endl;

	return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int solve(int, int)':
Main.cpp:40:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |  for(int i=1;i<mp[x].size();i++){
      |              ~^~~~~~~~~~~~~

• Subtask 1: 20 / 70