Compilare: main.cpp: In function 'int main()': main.cpp:59:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j< v.size();j++) ~^~~~~~~~~~ main.cpp:17:9: warning: unused variable 'k' [-Wunused-variable] int k = 1, ok = 0, c = 1; ^ main.cpp:17:16: warning: unused variable 'ok' [-Wunused-variable] int k = 1, ok = 0, c = 1; ^~ main.cpp:17:24: warning: unused variable 'c' [-Wunused-variable] int k = 1, ok = 0, c = 1; ^ main.cpp:18:9: warning: unused variable 'pos' [-Wunused-variable] int pos[200001],a[200001]; ^~~ main.cpp:18:21: warning: unused variable 'a' [-Wunused-variable] int pos[200001],a[200001]; ^