Compilare: main.cpp: In function 'void calc_cmmmc()': main.cpp:44:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < s.size(); i++) ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:209:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("bolt.in", "r", stdin); ^ main.cpp:210:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("bolt.out", "w", stdout); ^ main.cpp:212:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %s %s", &n, sk, ss); ^