Compilare: main.cpp: In function 'int main()': main.cpp:48:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < ciur.size(); i++){ ~~^~~~~~~~~~~~~ main.cpp:58:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < ciur.size(); i++){ ~~^~~~~~~~~~~~~ main.cpp:17:9: warning: unused variable 'a' [-Wunused-variable] int a = 0; ^ main.cpp:32:18: warning: unused variable 'sum' [-Wunused-variable] int m, n, x, sum, ok = 1, b; ^~~ main.cpp:32:31: warning: unused variable 'b' [-Wunused-variable] int m, n, x, sum, ok = 1, b; ^