Compilare: user.cpp: In function ‘int main()’: user.cpp:23:47: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] else t[i&1][j]=(1LL*(j+1)*t[(i&1==1)?(0):(1)][j+1]+1LL*(i-j-1)*t[(i&1==1)?(0):(1)][j])op+(((j>=1)?(t[(i&1==1)?(0):(1)][j-1]):(0)))op; ^ user.cpp:23:84: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] else t[i&1][j]=(1LL*(j+1)*t[(i&1==1)?(0):(1)][j+1]+1LL*(i-j-1)*t[(i&1==1)?(0):(1)][j])op+(((j>=1)?(t[(i&1==1)?(0):(1)][j-1]):(0)))op; ^ user.cpp:23:120: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] else t[i&1][j]=(1LL*(j+1)*t[(i&1==1)?(0):(1)][j+1]+1LL*(i-j-1)*t[(i&1==1)?(0):(1)][j])op+(((j>=1)?(t[(i&1==1)?(0):(1)][j-1]):(0)))op; ^ user.cpp:17:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( IN , "r" , stdin ); ^ user.cpp:18:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( OUT , "w" , stdout ); ^ user.cpp:19:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&k); ^