Compilare: user.cpp: In function ‘int main()’: user.cpp:32:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (h=0;h<=(v1[v[i][j]].size()-1);h++) ^ user.cpp:46:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<=(v[s[i]].size()-1);j++) ^ user.cpp:51:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (k=0;k<=v[x].size();k++) ^ user.cpp:58:62: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (h=0;h<=(v1[v[x][k]].size()-1);h++) ^ user.cpp:9:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("cuplaj.in","r",stdin); ^ user.cpp:10:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("cuplaj.out","w",stdout); ^ user.cpp:11:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d %d", &n, &m, &e); ^ user.cpp:14:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &x, &y); ^