Submission #850149

#	Time	Username	Problem	Language	Result	Execution time	Memory
850149		leanchec	Stone Arranging 2 (JOI23_ho_t1)	C++17	100 / 100	240 ms	25816 KiB

Main

#include<bits/stdc++.h>

using namespace std;

int main(){
    int n, ind=1, maior[300100]={};
    cin >> n;
    map<int,int> compress;
    map<int,int> descompress;
    vector<int> v(n);
    vector<pair<pair<int,int>, int>> resp;

    for(int i=0; i<n; i++){
        cin >> v[i];
        maior[i]=-1;
    }
    maior[n]=-1;

    vector<int> aux=v;

    sort(aux.begin(), aux.end());

    compress[aux[0]]=ind;
    descompress[ind]=aux[0];
    ind++;

    for(int i=1; i<n; i++){
        if(aux[i]>aux[i-1]){
            compress[aux[i]]=ind;
            descompress[ind]=aux[i];
            ind++;
        }
    }

    for(int i=0; i<n; i++){
        int cur=compress[v[i]];
        if(maior[cur]!=-1)resp.push_back({{maior[cur], i}, descompress[cur]});
        maior[cur]=i;
    }

    sort(resp.begin(), resp.end());

    int ptr=0, ptr2=0, ultimo;

    while(ptr<n){
        while(ptr2<(int)resp.size() && ptr>resp[ptr2].first.first && ultimo!=resp[ptr2].second){
            ptr2++;
        }
        if(ptr2==(int)resp.size())break;
        if(ptr<resp[ptr2].first.first){
            cout << v[ptr] << '\n';
            ptr++;
            continue;
        }
        while(ptr<=resp[ptr2].first.second){
            cout << resp[ptr2].second << '\n';
            ptr++;
        }
        ultimo=resp[ptr2].second;
        ptr2++;
    }

    while(ptr<n){
        cout << v[ptr] << '\n';
        ptr++;
    }

    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:46:67: warning: 'ultimo' may be used uninitialized in this function [-Wmaybe-uninitialized]
   46 |         while(ptr2<(int)resp.size() && ptr>resp[ptr2].first.first && ultimo!=resp[ptr2].second){
      |               ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 25 / 25
• Subtask 2: 35 / 35
• Subtask 3: 40 / 40