Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:27:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | for(int i=0;i<gr[x].size();i++) | ~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:93:4: warning: this 'for' clause does not guard... [-Wmisleading-indentation] 93 | for(int i=2;i<=n-1;i++) | ^~~ main.cpp:109:5: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for' 109 | dfs(1, 0); | ^~~ main.cpp: In function 'void fill(int, int, int)': main.cpp:17:22: warning: iteration 7 invokes undefined behavior [-Waggressive-loop-optimizations] 17 | if(inmat(x + di[i],y + dj[i])&&a[x+di[i]][y+dj[i]]==t&&v[x + di[i]][y + dj[i]]==0) | ~~~~^ main.cpp:16:18: note: within this loop 16 | for(int i=0;i<8;i++) | ~^~