Compilare: main.cpp: In function 'void lapse(std::pair<int, int>)': main.cpp:62:9: warning: unused variable 'pos' [-Wunused-variable] int pos = pr.second; ^~~ main.cpp: In function 'int main()': main.cpp:84:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("clepsidru.in", "r", stdin); ^ main.cpp:85:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("clepsidru.out", "w", stdout); ^