Compilare: user.cpp: In function ‘int main()’: user.cpp:38:55: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] d[i][j]=d[i-1][j]*(v[i+j-1]<<i-1==(c&1<<i-1))+d[i][j-1]*(v[i+j-1]<<j-1==(c&1<<j-1)); ^ user.cpp:38:66: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] d[i][j]=d[i-1][j]*(v[i+j-1]<<i-1==(c&1<<i-1))+d[i][j-1]*(v[i+j-1]<<j-1==(c&1<<j-1)); ^ user.cpp:38:93: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] d[i][j]=d[i-1][j]*(v[i+j-1]<<i-1==(c&1<<i-1))+d[i][j-1]*(v[i+j-1]<<j-1==(c&1<<j-1)); ^ user.cpp:38:104: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] d[i][j]=d[i-1][j]*(v[i+j-1]<<i-1==(c&1<<i-1))+d[i][j-1]*(v[i+j-1]<<j-1==(c&1<<j-1)); ^ user.cpp:12:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d ", &n); ^