Compilare: user.cpp: In function ‘void lant()’: user.cpp:141:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[i][nod].size()>l[i][nod] || v[nod][i].size()>l[nod][i]) ^ user.cpp:141:71: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[i][nod].size()>l[i][nod] || v[nod][i].size()>l[nod][i]) ^ user.cpp: In function ‘void ciclu(int)’: user.cpp:164:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[i][nod].size()>l[i][nod] || v[nod][i].size()>l[nod][i]) ^ user.cpp:164:71: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[i][nod].size()>l[i][nod] || v[nod][i].size()>l[nod][i]) ^ user.cpp:154:9: warning: unused variable ‘i’ [-Wunused-variable] int i; ^ user.cpp: In function ‘int main()’: user.cpp:206:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("domino.in", "r", stdin); ^ user.cpp:207:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("domino.out", "w", stdout); ^ user.cpp:211:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:215:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^