Compilare: user.cpp: In function ‘void ve(int, int)’: user.cpp:41:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(lnou>=1&&lnou<=n&&cnou<=m&&cnou>=1) ^ user.cpp:34:13: warning: unused variable ‘ln’ [-Wunused-variable] int k=0,ln=0,cn=0; ^ user.cpp:34:18: warning: unused variable ‘cn’ [-Wunused-variable] int k=0,ln=0,cn=0; ^ user.cpp: In function ‘int main()’: user.cpp:151:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<f[poz].size();i++) ^ user.cpp:159:19: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(lnou>=1&&lnou<=n&&cnou<=m&&cnou>=1) ^ user.cpp:183:21: warning: ‘p’ may be used uninitialized in this function [-Wmaybe-uninitialized] int l=f[i][p].second.first; ^