제출 #779371

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
779371		kamelfanger83	카니발 티켓 (IOI20_tickets)	C++17	0 / 100	1 ms	284 KiB

tickets

#include "tickets.h"
#include <vector>
#include <algorithm>
#include <numeric>
#include <cassert>

#define int long long

using namespace std;

long long find_maximum(signed k, vector<vector<signed>> x) {
    int n = x.size();
    int m = x[0].size();
    vector<vector<signed>> answer (n, vector<signed> (m, -1));
    int ans = 0;


    vector<int> cuts (n, 0);
    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < m; ++j) {
            if (x[i][j] == 0) cuts[i] = j + 1;
        }
    }

    vector<int> oprov (n);
    iota(oprov.begin(), oprov.end(), 0);
    sort(oprov.begin(), oprov.end(), [&](int a, int b){return cuts[a] > cuts[b];});

    int uz, uo;
    for (int i = 0; i < n; ++i) {
        uz += min(cuts[i], (int)k);
        uo += min(m - cuts[i], (int)k);
    }

    ans = min(uz, uo);

    for (int i = 0; i < k; ++i) {
        for (int j = 0; j < n / 2; ++j) {
            answer[oprov[j]][i] = i;
        }
        for (int j = n/2; j < n; ++j) {
            answer[oprov[j]][m-i-1] = i;
        }
    }


    allocate_tickets(answer);

    return ans;
}

컴파일 시 표준 에러 (stderr) 메시지

tickets.cpp: In function 'long long int find_maximum(int, std::vector<std::vector<int> >)':
tickets.cpp:29:13: warning: 'uo' may be used uninitialized in this function [-Wmaybe-uninitialized]
   29 |     int uz, uo;
      |             ^~
tickets.cpp:29:9: warning: 'uz' may be used uninitialized in this function [-Wmaybe-uninitialized]
   29 |     int uz, uo;
      |         ^~

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