Compilare: user.cpp: In function ‘int main()’: user.cpp:84:26: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] if(max(vis[1 - tot & 1][i], vis[1 - tot & 1][i + 1]) == 0) { ~~^~~~~ user.cpp:84:47: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] if(max(vis[1 - tot & 1][i], vis[1 - tot & 1][i + 1]) == 0) { ~~^~~~~ user.cpp:88:22: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] if(vis[1 - tot & 1][i] && vis[1 - tot & 1][i + 1]) { ~~^~~~~ user.cpp:88:45: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] if(vis[1 - tot & 1][i] && vis[1 - tot & 1][i + 1]) { ~~^~~~~ user.cpp:93:22: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] if(vis[1 - tot & 1][i]) { ~~^~~~~ user.cpp:96:22: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] if(vis[1 - tot & 1][i + 1]) { ~~^~~~~ user.cpp:72:9: warning: unused variable ‘lim’ [-Wunused-variable] int lim = k - (n + 1) / 2; ^~~ user.cpp:71:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d " ,&n,&k); ^