Compilare: main.cpp: In function 'int main()': main.cpp:37:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("split2.in", "r", stdin); ^ main.cpp:38:44: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("split2.out", "w", stdout); ^ main.cpp:59:32: warning: 'sol' may be used uninitialized in this function [-Wmaybe-uninitialized] cout << sol << "\n"; ^~~~