Compilare: user.cpp: In function ‘int main()’: user.cpp:86:22: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] if(vis[1 - tot & 1][i] == 0 && vis[1 - tot & 1][i + 1] == 0) { ~~^~~~~ user.cpp:86:50: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] if(vis[1 - tot & 1][i] == 0 && vis[1 - tot & 1][i + 1] == 0) { ~~^~~~~ user.cpp:90:22: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] if(vis[1 - tot & 1][i] && vis[1 - tot & 1][i + 1]) { ~~^~~~~ user.cpp:90:45: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] if(vis[1 - tot & 1][i] && vis[1 - tot & 1][i + 1]) { ~~^~~~~ user.cpp:91:45: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] a[tot & 1][i] = add(add(a[1 - tot & 1][i], a[1 - tot & 1][i + 1]), b); ~~^~~~~ user.cpp:91:64: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] a[tot & 1][i] = add(add(a[1 - tot & 1][i], a[1 - tot & 1][i + 1]), b); ~~^~~~~ user.cpp:94:22: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] if(vis[1 - tot & 1][i]) { ~~^~~~~ user.cpp:95:46: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] a[tot & 1][i] = multiply(a[1 - tot & 1][i], 2); ~~^~~~~ user.cpp:97:22: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] if(vis[1 - tot & 1][i + 1]) { ~~^~~~~ user.cpp:98:46: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] a[tot & 1][i] = multiply(a[1 - tot & 1][i + 1], 2); ~~^~~~~ 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); ^