Compilare: main.cpp:2:47: warning: bad option '-f Ofast' to pragma 'optimize' [-Wpragmas] 2 | #pragma GCC optimize("O3, Ofast, unroll-loops") | ^ main.cpp:2:47: warning: bad option '-f unroll-loops' to pragma 'optimize' [-Wpragmas] main.cpp:17:10: warning: bad option '-f Ofast' to attribute 'optimize' [-Wattributes] 17 | int main() { | ^ main.cpp:17:10: warning: bad option '-f unroll-loops' to attribute 'optimize' [-Wattributes] main.cpp: In function 'int main()': main.cpp:26:26: warning: comparison of integer expressions of different signedness: 'int' and 'll' {aka 'long long unsigned int'} [-Wsign-compare] 26 | for(int i = 1; i <= n; i++) { | ~~^~~~ main.cpp:32:26: warning: comparison of integer expressions of different signedness: 'int' and 'll' {aka 'long long unsigned int'} [-Wsign-compare] 32 | for(int i = 1; i <= n - 1; i++) { | ~~^~~~~~~~ main.cpp:37:38: warning: comparison of integer expressions of different signedness: 'int' and 'll' {aka 'long long unsigned int'} [-Wsign-compare] 37 | for(int j = i + 1; j <= n ; j++) { | ~~^~~~