Compilare: user.cpp: In function ‘int main()’: user.cpp:136:28: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] while(i<4&&mat[1-lvl&1][lin+dl[i]][col+dc[i]]+1!=mat[1-lvl&1][lin][col]) ^ user.cpp:136:66: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] while(i<4&&mat[1-lvl&1][lin+dl[i]][col+dc[i]]+1!=mat[1-lvl&1][lin][col]) ^ user.cpp:18:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d%d" ,&t,&n,&v); ^