Pallo

input/code.cpp: In function 'void set_io(std::__cxx11::string)':
input/code.cpp:19:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
         freopen((filename + ".in").c_str(), "r", stdin);
         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
input/code.cpp:20:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
         freopen((filename + ".out").c_str(), "w", stdout);
         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define all(x) (x).begin(), (x).end()
#define pb push_back
#define fi first
#define se second
#define sz size
#define rsz resize
#define ii pair<int,int>
#define vi vector<int>
#define vvi vector<vector<int>>

void set_io(string filename = "") {
    ios::sync_with_stdio(0);
    cin.tie(0);

    if (filename != "") {
        freopen((filename + ".in").c_str(), "r", stdin);
        freopen((filename + ".out").c_str(), "w", stdout);
    }
}

int dx[] {1, 1, -1, -1}, dy[] {1, -1, -1, 1};

int main() {
	set_io("");

    int t; cin >> t;

    while (t--) {
        int h, w, k; cin >> h >> w >> k;

        ll bounces = 0;
        int x = 1, y = 1, dir = 0;
        while (k--) {
            if (x == 0 || x == w - 1 || y == 0 || y == h - 1) {
                if ((x == 0 || x == w - 1) && (y == 0 || y == h - 1)) {
                    dir += 2;
                    dir %= 4;
                } else if ((dir == 0 && x == w - 1) || (dir == 1 && y == 0) ||
                           (dir == 2 && x == 0) || (dir == 3 && y == h - 1)) {
                    dir += 3;
                    dir %= 4;
                } else {
                    dir++;
                    dir %= 4;
                }
                bounces++;
            }
            x += dx[dir];
            y += dy[dir];
        }

        cout << bounces << endl;
    }
}

Test 1

Group: 1, 2, 3

Verdict: ACCEPTED

Test 2

Group: 2, 3

Verdict: TIME LIMIT EXCEEDED

Test 3

Group: 3

Verdict: TIME LIMIT EXCEEDED