Compilare: main.cpp: In function 'int main()': main.cpp:20:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (a[i]>=y2) ~~~~^~~~ main.cpp:24:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (a[i]>=y1) ~~~~^~~~ main.cpp:9:24: warning: unused variable 'j' [-Wunused-variable] long long n, m, i, j, q, x1, y1, x2, y2, s; ^