Compilare: user.cpp: In function ‘void rezolva1()’: user.cpp:47:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i<C.size()) ^ user.cpp: In function ‘void rezolva2()’: user.cpp:106:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i<C.size()) ^ user.cpp: In function ‘int main()’: user.cpp:154:102: warning: operation on ‘mat[(a + 2l)][b]’ may be undefined [-Wsequence-point] mat[a-1][b-1]=mat[a-1][b+1]=mat[a+2][b]=mat[a+1][b+1]=mat[a+1][b-1]=mat[a+2][b]=mat[a][b+2]=1; ^ user.cpp:134:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cartite.in","r",stdin); ^ user.cpp:135:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld%ld%ld",&t,&n,&m); ^ user.cpp:136:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld%ld",&x,&y); ^ user.cpp:137:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld",&k); ^ user.cpp:142:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld%ld%ld",&a,&b,&c); ^ user.cpp:157:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld",&G); ^ user.cpp:162:44: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld%ld%ld%ld",&X,&Y,&X2,&Y2); ^