Compilare: main.cpp: In function 'long long int prev(long long int)': main.cpp:31:42: warning: right operand of comma operator has no effect [-Wunused-value] 31 | stx = 1, drx = n, minnx = inf, mijx, ix, solx; | ^~ main.cpp:31:46: warning: right operand of comma operator has no effect [-Wunused-value] 31 | stx = 1, drx = n, minnx = inf, mijx, ix, solx; | ^~~~ main.cpp:31:50: warning: right operand of comma operator has no effect [-Wunused-value] 31 | stx = 1, drx = n, minnx = inf, mijx, ix, solx; | ^ main.cpp: In function 'int main()': main.cpp:51:23: warning: unused variable 'j' [-Wunused-variable] 51 | int c, p1, p2, i, j, st, dr, mij, sol, act, aux, cnt = 0, solfin, p = 0; | ^ main.cpp:51:44: warning: unused variable 'act' [-Wunused-variable] 51 | int c, p1, p2, i, j, st, dr, mij, sol, act, aux, cnt = 0, solfin, p = 0; | ^~~ main.cpp:51:71: warning: unused variable 'p' [-Wunused-variable] 51 | int c, p1, p2, i, j, st, dr, mij, sol, act, aux, cnt = 0, solfin, p = 0; | ^ main.cpp:82:20: warning: 'sol' may be used uninitialized in this function [-Wmaybe-uninitialized] 82 | sol = prev (sol); | ~~~~~^~~~~