Compilare: user.cpp: In function ‘int main()’: user.cpp:31:28: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] d[i & 1][c] = (d[1 - i & 1][c + v[i]] + d[1 - i & 1][c - v[i]] + d[1 - i & 1][c]) % MOD; ^ user.cpp:31:53: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] d[i & 1][c] = (d[1 - i & 1][c + v[i]] + d[1 - i & 1][c - v[i]] + d[1 - i & 1][c]) % MOD; ^ user.cpp:31:78: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] d[i & 1][c] = (d[1 - i & 1][c + v[i]] + d[1 - i & 1][c - v[i]] + d[1 - i & 1][c]) % MOD; ^ user.cpp:13:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d%d", &n, &m, &x); ^