Compilare: main.cpp: In function 'int main()': main.cpp:108:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("manhattan.in", "r", stdin); ^ main.cpp:109:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("manhattan.out", "w", stdout); ^ main.cpp: In function 'int solve(int, int, int, int, int, int, int, int)': main.cpp:43:19: warning: 'res2' may be used uninitialized in this function [-Wmaybe-uninitialized] int res1, res2, res3, res4; ^~~~ main.cpp:43:13: warning: 'res1' may be used uninitialized in this function [-Wmaybe-uninitialized] int res1, res2, res3, res4; ^~~~