Compilare: main.cpp: In function 'void bfs1()': main.cpp:25:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | for(i=0; i<g[k].size(); i++) | ~^~~~~~~~~~~~ main.cpp: In function 'void bfs2()': main.cpp:45:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | for(i=0; i<g[k].size(); i++) | ~^~~~~~~~~~~~ main.cpp: In function 'int ok(int)': main.cpp:55:1: warning: this 'for' clause does not guard... [-Wmisleading-indentation] 55 | for(i=1; i<=n; i++) | ^~~ main.cpp:57:5: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for' 57 | return 1; | ^~~~~~ main.cpp: In function 'int main()': main.cpp:85:1: warning: this 'for' clause does not guard... [-Wmisleading-indentation] 85 | for(i=1; i<=cnt; i++) | ^~~ main.cpp:91:5: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for' 91 | return 0; | ^~~~~~ main.cpp:63:9: warning: unused variable 'j' [-Wunused-variable] 63 | {int i, j; | ^