Submission #963453

#	Time	Username	Problem	Language	Result	Execution time	Memory
963453		Namkhing	Thousands Islands (IOI22_islands)	C++17	6.75 / 100	25 ms	4436 KiB

islands

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

variant<bool, vector<int>> find_journey(int N, int M, vector<int> U, vector<int> V) {
    int first = 0, second = 0;

    for (int u : U) {
        if (u) {
            second++;
        }
        else {
            first++;
        }
    }

    if (first < 2 || second < 1) {
        return false;
    }

    int a, b, c;

    for (int i = 0; i < M; i++) {
        if (!U[i]) {
            a = i;
            break;
        }
    }

    for (int i = M - 1; i >= 0; i--) {
        if (!U[i]) {
            b = i;
            break;
        }
    }

    for (int i = 0; i < M; i++) {
        if (U[i]) {
            c = i;
            break;
        }
    }

    vector<int> r = {a, c, b, a, c, b};
    return r;
}

Compilation message (stderr)

islands.cpp: In function 'std::variant<bool, std::vector<int, std::allocator<int> > > find_journey(int, int, std::vector<int>, std::vector<int>)':
islands.cpp:44:38: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized]
   44 |     vector<int> r = {a, c, b, a, c, b};
      |                                      ^
islands.cpp:44:38: warning: 'a' may be used uninitialized in this function [-Wmaybe-uninitialized]
islands.cpp:44:38: warning: 'c' may be used uninitialized in this function [-Wmaybe-uninitialized]

• Subtask 1: 5 / 5
• Subtask 2: 1.75 / 5
• Subtask 3: 0 / 21
• Subtask 4: 0 / 24
• Subtask 5: 0 / 45