Compilare: main.cpp: In function 'int main()': main.cpp:39:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation] if (prevap[a[i]]) ^~ main.cpp:42:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if' prevap[a[i]] = i; ^~~~~~ main.cpp:46:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < q[i].size(); ++ j) ~~^~~~~~~~~~~~~