Compilare: main.cpp: In function 'int32_t main()': main.cpp:156:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen(PROB_NAME".in", "r", stdin); ^ main.cpp:157:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen(PROB_NAME".out", "w", stdout); ^ main.cpp:185:38: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized] cout << sol << '\n' << x << ' ' << y; ^ main.cpp:185:30: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized] cout << sol << '\n' << x << ' ' << y; ^~~