Compilare: main.cpp: In function 'int main()': main.cpp:80:13: warning: unused variable 'nr' [-Wunused-variable] int nr=0; ^~ main.cpp:54:9: warning: unused variable 'n' [-Wunused-variable] int n=0; ^ main.cpp:51:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("emm.in", "r", stdin); ^ main.cpp:52:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("emm.out", "w", stdout); ^ main.cpp:53:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s", s); ^