Compilare: main.cpp:1:58: warning: bad option '-f fast-math' to pragma 'optimize' [-Wpragmas] 1 | #pragma GCC optimize("O3, fast-math, unroll-loops, Ofast") | ^ main.cpp:1:58: warning: bad option '-f unroll-loops' to pragma 'optimize' [-Wpragmas] main.cpp:1:58: warning: bad option '-f Ofast' to pragma 'optimize' [-Wpragmas] main.cpp:18:28: warning: bad option '-f fast-math' to attribute 'optimize' [-Wattributes] 18 | bool intersect(pii a, pii b) | ^ main.cpp:18:28: warning: bad option '-f unroll-loops' to attribute 'optimize' [-Wattributes] main.cpp:18:28: warning: bad option '-f Ofast' to attribute 'optimize' [-Wattributes] main.cpp: In function 'bool intersect(std::pair<int, int>, std::pair<int, int>)': main.cpp:20:9: warning: unused variable 'mini' [-Wunused-variable] 20 | int mini = min(a.first, b.first); | ^~~~ main.cpp:21:9: warning: unused variable 'maxi' [-Wunused-variable] 21 | int maxi = max(a.second, b.second); | ^~~~ main.cpp: At global scope: main.cpp:24:25: warning: bad option '-f fast-math' to attribute 'optimize' [-Wattributes] 24 | pii reunion(pii a, pii b) | ^ main.cpp:24:25: warning: bad option '-f unroll-loops' to attribute 'optimize' [-Wattributes] main.cpp:24:25: warning: bad option '-f Ofast' to attribute 'optimize' [-Wattributes] main.cpp:38:37: warning: bad option '-f fast-math' to attribute 'optimize' [-Wattributes] 38 | int32_t main(int argc, char * argv[]) | ^ main.cpp:38:37: warning: bad option '-f unroll-loops' to attribute 'optimize' [-Wattributes] main.cpp:38:37: warning: bad option '-f Ofast' to attribute 'optimize' [-Wattributes]