Compilare: user.cpp: In function ‘void solve1()’: user.cpp:27:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(text.length()>lmax) ^ user.cpp:33:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(text.length()==lmax) ^ user.cpp: In function ‘void solve2()’: user.cpp:72:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(i!=j) ^ user.cpp:69:14: warning: unused variable ‘ok’ [-Wunused-variable] bool ok=1; ^ user.cpp: In function ‘int main()’: user.cpp:101:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("interesant.in","r",stdin); ^ user.cpp:102:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("interesant.out","w",stdout); ^ user.cpp:103:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n",&v, &n); ^