Submission #423772

#TimeUsernameProblemLanguageResultExecution timeMemory
423772humbertoyustaCarnival Tickets (IOI20_tickets)C++14
27 / 100
714 ms77924 KiB
#include "tickets.h" #include<bits/stdc++.h> using namespace std; #define f first #define s second #define db(x) cerr << #x << ": " << (x) << '\n'; #define pb push_back #define all(x) x.begin() , x.end() typedef long long ll; typedef pair<int,int> ii; long long find_maximum(int k, std::vector<std::vector<int>> x) { int n = x.size(); int m = x[0].size(); std::vector<std::vector<int>> answer, fans; for (int i = 0; i < n; i++) { std::vector<int> row(m); for (int j = 0; j < m; j++) { row[j] = -1; } answer.push_back(row); fans.pb(row); } ll res = 0; vector<vector<ii>> mat; for(int i=0; i<n; i++){ vector<ii> row(m); for(int j=0; j<m; j++){ row[j] = { x[i][j] , j }; } sort(all(row)); mat.pb(row); } for(int i=0; i<n; i++){ for(int j=0; j<k; j++){ res -= mat[i][j].f; fans[i][j] = 0; } } priority_queue<pair<int,ii>> q; for(int i=0; i<n; i++){ q.push({mat[i][k-1].f + mat[i][m-1].f,{i,-1}}); } for(int t=0; t<n*k/2; t++){ pair<ll,ii> p = q.top(); res += p.f; q.pop(); fans[p.s.f][m+p.s.s] = 1; if( m != k ) fans[p.s.f][k+p.s.s] = -1; if( abs(p.s.s - 1) <= k ){ p.s.s--; q.push({mat[p.s.f][k+p.s.s].f+mat[p.s.f][m+p.s.s].f,{p.s.f,p.s.s}}); } } vector<int> mx(k), mn(k); for(int i=0; i<k; i++) mn[i] = mx[i] = n / 2; for(int i=0; i<n; i++){ int c1 = 0, c2 = 0; for(int j=0; j<m; j++){ if( fans[i][j] == 0 ){ while( mn[c1] == 0 ) c1 = ( c1 + 1 ) % k; answer[i][j] = c1; mn[c1] --; c1 = ( c1 + 1 ) % k; } if( fans[i][j] == 1 ){ while( mx[c1] == 0 ) c1 = ( c1 + 1 ) % k; answer[i][j] = c1; mx[c1] --; c1 = ( c1 + 1 ) % k; } } } allocate_tickets(answer); return res; }

Compilation message (stderr)

tickets.cpp: In function 'long long int find_maximum(int, std::vector<std::vector<int> >)':
tickets.cpp:73:21: warning: unused variable 'c2' [-Wunused-variable]
   73 |         int c1 = 0, c2 = 0;
      |                     ^~
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