Compilare: user.cpp: In function ‘int main()’: user.cpp:46:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=v[0].c+1;i<a[v[0].l].size();i++) ^ user.cpp:52:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<v.size();i++) ^ user.cpp:58:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=v[i].c+1;j<a[v[i].l].size();j++) ^ user.cpp:73:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=v[i].c+1;j<a[v[i].l].size();j++) ^ user.cpp:25:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ttg.in","r",stdin); ^ user.cpp:26:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ttg.out","w",stdout); ^ user.cpp:27:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&q); ^ user.cpp:30:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&m); ^ user.cpp:34:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^ user.cpp:89:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^