Compilare: main.cpp: In function 'void BUNA(const string&)': main.cpp:22:62: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen((task + ".out").c_str(), "w", stdout); ^ main.cpp:22:62: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] main.cpp: In function 'void solve(int, int, int, int)': main.cpp:61:30: warning: 'wh' may be used uninitialized in this function [-Wmaybe-uninitialized] solve(st, mij - 1, a, wh); ^ main.cpp:53:9: warning: 'wh' may be used uninitialized in this function [-Wmaybe-uninitialized] int wh; ^~ main.cpp:53:9: warning: 'wh' may be used uninitialized in this function [-Wmaybe-uninitialized] main.cpp:53:9: warning: 'wh' may be used uninitialized in this function [-Wmaybe-uninitialized] main.cpp:53:9: warning: 'wh' may be used uninitialized in this function [-Wmaybe-uninitialized] main.cpp:53:9: warning: 'wh' may be used uninitialized in this function [-Wmaybe-uninitialized] main.cpp:53:9: warning: 'wh' may be used uninitialized in this function [-Wmaybe-uninitialized] main.cpp:53:9: warning: 'wh' may be used uninitialized in this function [-Wmaybe-uninitialized] main.cpp:53:9: warning: 'wh' may be used uninitialized in this function [-Wmaybe-uninitialized] main.cpp: In function 'int main()': main.cpp:61:30: warning: 'wh' may be used uninitialized in this function [-Wmaybe-uninitialized] solve(st, mij - 1, a, wh); ^ main.cpp:53:9: note: 'wh' was declared here int wh; ^~ main.cpp:61:30: warning: 'wh' may be used uninitialized in this function [-Wmaybe-uninitialized] solve(st, mij - 1, a, wh); ^ main.cpp:53:9: note: 'wh' was declared here int wh; ^~