Compilare: user.cpp: In function ‘bool fin(int, int)’: user.cpp:24:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<l[x].size(); ++i) ^ user.cpp: In function ‘void df(int)’: user.cpp:57:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<l[x].size(); ++i) ^ user.cpp: In function ‘void sterge(int)’: user.cpp:72:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<l[x].size(); ++i) ^ user.cpp:74:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<l[l[x][i]].size(); ++j) ^ user.cpp: In function ‘int main()’: user.cpp:90:27: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[301]’ [-Wformat=] scanf("%s\n",&s[i]); ^ user.cpp:120:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(l[y[j]].size()<t) ^ user.cpp:86:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zone2.in","r",stdin); ^ user.cpp:87:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zone2.out","w",stdout); ^ user.cpp:88:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d\n",&n,&m,&t); ^ user.cpp:90:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n",&s[i]); ^