Compilare: user.cpp: In function ‘int main()’: user.cpp:53:15: warning: unused variable ‘mi’ [-Wunused-variable] int n,m,i,mi,j,ans; ^ user.cpp:53:20: warning: unused variable ‘ans’ [-Wunused-variable] int n,m,i,mi,j,ans; ^ user.cpp:51:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("puncte.in","r",stdin); ^ user.cpp:52:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("puncte.out","w",stdout); ^ user.cpp:54:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d\n",&n,&m); ^ user.cpp:57:16: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s); ^ user.cpp:74:18: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s); ^ /tmp/ccSrX6hH.o: In function `main': user.cpp:(.text.startup+0x83): warning: the `gets' function is dangerous and should not be used.