Submission #670918

#	Time	Username	Problem	Language	Result	Execution time	Memory
670918		BidoTeima	Doktor (COCI17_doktor)	C++17	100 / 100	263 ms	43768 KiB

doktor

/*
ID: BidoTeima
LANG: C++11
TASK:
*/
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
void moo(string filename);
void ACPLS(string str = "")
{
    if(str=="NOF")return;
    if(str.size())
        moo(str);
    else{
#ifndef ONLINE_JUDGE
        freopen("output.txt", "w", stdout);
        freopen("input.txt", "r", stdin);
#endif
    }
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
}
void moo(string fileName){
    freopen((fileName+".in").c_str(),"r",stdin);
    freopen((fileName+".out").c_str(),"w",stdout);
}
#define tc         \
    int tttttt/*,subtask*/;    \
    cin >> tttttt/* >> subtask*/; \
    while (tttttt--)/*end
*/

int main()
{
    //ACPLS(); 
    int n;
    cin>>n;
    vector<pair<int,int>>v[2 * n + 1];
    int pos[n+1],a[n + 1];
    int ps[n + 1]={0};
    for(int i = 1; i <= n; i++){
        int x;
        cin>>x;
        a[i] = x;
        pos[x] = i; 
        if(i == x){
            ps[i]++;
            //ans++;
        }
        ps[i] += ps[i - 1];
    }
    for(int i = 1; i <= n; i++){
        v[i + pos[i]].push_back({min(i, pos[i]), max(i, pos[i])});
        //cout<<ps[i]<<'\n';
    }
    int res = 0;
    pair<int,int>ans={1,1};
    for(int i = 1; i <= 2 * n; i++){
        sort(v[i].begin(), v[i].end());
        for(int j = 0; j < (int)v[i].size(); j++){
            // contribution = no of (x,y) inside - no opf fixed points inside
            if((int)v[i].size() - j - (ps[v[i][j].second] - ps[v[i][j].first - 1]) > res){
                res = (int)v[i].size() - j - (ps[v[i][j].second] - ps[v[i][j].first - 1]);
                ans={v[i][j].first,v[i][j].second};
            }
            //cout<<res<<' '<<v[i][j].first<<' '<<v[i][j].second<<'\n';
        }
    }
    cout<<a[ans.first]<<' '<<a[ans.second]<<'\n';
}

Compilation message (stderr)

doktor.cpp: In function 'void ACPLS(std::string)':
doktor.cpp:17:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |         freopen("output.txt", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
doktor.cpp:18:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |         freopen("input.txt", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
doktor.cpp: In function 'void moo(std::string)':
doktor.cpp:26:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |     freopen((fileName+".in").c_str(),"r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
doktor.cpp:27:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |     freopen((fileName+".out").c_str(),"w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10