Compilare: user.cpp: In function ‘void solve(char*, int)’: user.cpp:33:13: warning: narrowing conversion of ‘0.0’ from ‘double’ to ‘int’ inside { } [-Wnarrowing] v[i]={0.0}; ^ user.cpp:34:23: warning: unused variable ‘nr’ [-Wunused-variable] int l=strlen(sir),nr=0; ^ user.cpp: In function ‘int main()’: user.cpp:54:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("twosets.in","r",stdin); ^ user.cpp:55:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("twosets.out","w",stdout); ^ user.cpp:57:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n",&t); ^ user.cpp:60:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n",sir); ^ user.cpp:65:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n",sir); ^