Compilare: main.cpp:4: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas] 4 | #pragma GCC optimization("O3") | main.cpp:5: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas] 5 | #pragma GCC optimization("unroll-loops") | main.cpp: In function 'int main()': main.cpp:17:23: warning: unused variable 'a' [-Wunused-variable] 17 | int i, j, ai, aj, a, b, acp, activ, cx, cy, x, y, mask, p1, p2, s = 0; | ^ main.cpp:17:26: warning: unused variable 'b' [-Wunused-variable] 17 | int i, j, ai, aj, a, b, acp, activ, cx, cy, x, y, mask, p1, p2, s = 0; | ^ main.cpp:17:29: warning: unused variable 'acp' [-Wunused-variable] 17 | int i, j, ai, aj, a, b, acp, activ, cx, cy, x, y, mask, p1, p2, s = 0; | ^~~ main.cpp:17:34: warning: unused variable 'activ' [-Wunused-variable] 17 | int i, j, ai, aj, a, b, acp, activ, cx, cy, x, y, mask, p1, p2, s = 0; | ^~~~~ main.cpp:17:61: warning: unused variable 'p1' [-Wunused-variable] 17 | int i, j, ai, aj, a, b, acp, activ, cx, cy, x, y, mask, p1, p2, s = 0; | ^~ main.cpp:17:65: warning: unused variable 'p2' [-Wunused-variable] 17 | int i, j, ai, aj, a, b, acp, activ, cx, cy, x, y, mask, p1, p2, s = 0; | ^~