Compilare: user.cpp: In function ‘void p2()’: user.cpp:24:25: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] nr2[i]=nr+100*(1-i&1); ^ user.cpp:34:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v[i].size();++j) ^ user.cpp: In function ‘void p3()’: user.cpp:60:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v2[i].size();++j) ^ user.cpp: In function ‘void solve()’: user.cpp:82:19: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(R!=n+1) ^ user.cpp:110:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(R!=n+1) ^ user.cpp: In function ‘void sol()’: user.cpp:142:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<d.size();++i) ^ user.cpp: In function ‘int main()’: user.cpp:148:9: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] f>>c+1; ^