Compilare: user.cpp: In function ‘void disjoint(int, int)’: user.cpp:18:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0; j<a[mat[x][i]].size(); j++) ^ user.cpp: In function ‘void rezolvare()’: user.cpp:44:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int z=0; z<a[mat[i][j]].size(); z++) ^ user.cpp:57:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<v[i].size(); j++) ^ user.cpp:28:9: warning: unused variable ‘x’ [-Wunused-variable] int x,cmax=0; ^ user.cpp:29:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&c); ^ user.cpp:40:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&mat[i][j]); ^ user.cpp: In function ‘int main()’: user.cpp:67:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("piese3.in","r",stdin); ^ user.cpp:68:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("piese3.out","w",stdout); ^ user.cpp:69:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&T); ^