Compilare: main.cpp: In function 'int main()': main.cpp:109:4: warning: this 'else' clause does not guard... [-Wmisleading-indentation] else ^~~~ main.cpp:114:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else' ans[i].second = lastdistance; ^~~ main.cpp:135:41: warning: 'ybest' may be used uninitialized in this function [-Wmaybe-uninitialized] int disty = distance(ybest,query2[i]); ^ main.cpp:134:41: warning: 'xbest' may be used uninitialized in this function [-Wmaybe-uninitialized] int distx = distance(xbest,query2[i]); ^