Compilare: main.cpp: In function 'int op1(int)': main.cpp:12:25: warning: unused variable 'mij' [-Wunused-variable] 12 | int st = 1, dr = n, mij, sol=-1; | ^~~ main.cpp: In function 'int op2(int)': main.cpp:27:25: warning: unused variable 'mij' [-Wunused-variable] 27 | int st = 1, dr = n, mij, sol; | ^~~ main.cpp: In function 'int op3(int)': main.cpp:40:25: warning: unused variable 'mij' [-Wunused-variable] 40 | int st = 1, dr = n, mij, sol; | ^~~ main.cpp: In function 'int op2(int)': main.cpp:36:12: warning: 'sol' may be used uninitialized [-Wmaybe-uninitialized] 36 | return sol; | ^~~ main.cpp:27:30: note: 'sol' was declared here 27 | int st = 1, dr = n, mij, sol; | ^~~ main.cpp: In function 'int op3(int)': main.cpp:49:12: warning: 'sol' may be used uninitialized [-Wmaybe-uninitialized] 49 | return sol; | ^~~ main.cpp:40:30: note: 'sol' was declared here 40 | int st = 1, dr = n, mij, sol; | ^~~ main.cpp: In function 'int main()': main.cpp:67:31: warning: 'sol' may be used uninitialized [-Wmaybe-uninitialized] 67 | fout << op3(x) << "\n"; | ^~~~ main.cpp:40:30: note: 'sol' was declared here 40 | int st = 1, dr = n, mij, sol; | ^~~ main.cpp:65:31: warning: 'sol' may be used uninitialized [-Wmaybe-uninitialized] 65 | fout << op2(x) << "\n"; | ^~~~ main.cpp:27:30: note: 'sol' was declared here 27 | int st = 1, dr = n, mij, sol; | ^~~