Compilare: user.cpp: In function ‘int main()’: user.cpp:101:12: warning: unused variable ‘i’ [-Wunused-variable] int M, i, a, b, start = 1, inf = 2e9; ^ user.cpp:101:15: warning: unused variable ‘a’ [-Wunused-variable] int M, i, a, b, start = 1, inf = 2e9; ^ user.cpp:101:18: warning: unused variable ‘b’ [-Wunused-variable] int M, i, a, b, start = 1, inf = 2e9; ^ user.cpp:101:21: warning: unused variable ‘start’ [-Wunused-variable] int M, i, a, b, start = 1, inf = 2e9; ^ user.cpp:101:32: warning: unused variable ‘inf’ [-Wunused-variable] int M, i, a, b, start = 1, inf = 2e9; ^