Compilare: main.cpp: In function 'int main()': main.cpp:40:3: warning: operation on 'k' may be undefined [-Wsequence-point] 40 | w[++k] = w[k - 2] + w[k - 1]; | ^~~ main.cpp:40:3: warning: operation on 'k' may be undefined [-Wsequence-point] main.cpp:57:5: warning: operation on 'k' may be undefined [-Wsequence-point] 57 | w[++k] = w[c[p2]] + w[k - 1]; | ^~~ main.cpp:67:5: warning: operation on 'k' may be undefined [-Wsequence-point] 67 | w[++k] = w[c[p2]] + w[k - 1]; | ^~~