Compilare: main.cpp: In function 'void qr(int)': main.cpp:20:13: warning: comparison of integer expressions of different signedness: 'int' and 'long long unsigned int' [-Wsign-compare] 20 | while(in<=n) | ~~^~~ main.cpp: In function 'int main()': main.cpp:37:18: warning: comparison of integer expressions of different signedness: 'int' and 'long long unsigned int' [-Wsign-compare] 37 | for(int i=1;i<=n;++i) | ~^~~ main.cpp:44:18: warning: comparison of integer expressions of different signedness: 'int' and 'long long unsigned int' [-Wsign-compare] 44 | for(int i=1;i<=n;++i) | ~^~~ main.cpp:54:18: warning: comparison of integer expressions of different signedness: 'int' and 'long long unsigned int' [-Wsign-compare] 54 | for(int i=1;i<=n;++i) | ~^~~ main.cpp:35:9: warning: unused variable 'a' [-Wunused-variable] 35 | int a; | ^