Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:32:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | for(i=0;i<adj[curr].size();i++) | ~^~~~~~~~~~~~~~~~~ main.cpp: In function 'void dfs2(int, int)': main.cpp:51:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 51 | for(i=0;i<adj[curr].size();i++) | ~^~~~~~~~~~~~~~~~~ main.cpp: In function 'void dfs3(int, int)': main.cpp:134:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 134 | for(i=0;i<adj[curr].size();i++) | ~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:195:11: warning: unused variable 'j' [-Wunused-variable] 195 | int i,j,k,l,a,b,w,q,x,dist,dist2,lc,copdist; | ^ main.cpp:195:13: warning: unused variable 'k' [-Wunused-variable] 195 | int i,j,k,l,a,b,w,q,x,dist,dist2,lc,copdist; | ^ main.cpp:195:15: warning: unused variable 'l' [-Wunused-variable] 195 | int i,j,k,l,a,b,w,q,x,dist,dist2,lc,copdist; | ^ main.cpp: In function 'void dfs(int, int)': main.cpp:30:20: warning: iteration 21 invokes undefined behavior [-Waggressive-loop-optimizations] 30 | bl[i][curr]=bl[i-1][bl[i-1][curr]]; | ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp:28:14: note: within this loop 28 | for(i=1;i<=22;i++) | ~^~~~