Compilare: main.cpp: In function 'long long int P2(long long int, int)': main.cpp:263:8: warning: unused variable 't1' [-Wunused-variable] 263 | ld t1 = clock(); | ^~ main.cpp: In function 'int main()': main.cpp:311:8: warning: unused variable 'start' [-Wunused-variable] 311 | ld start = clock(); | ^~~~~ main.cpp:316:8: warning: unused variable 'end' [-Wunused-variable] 316 | ld end = clock(); | ^~~