Compilare: user.cpp: In function ‘void DF(int, int)’: user.cpp:39:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < a[x].size(); ++i) ^ user.cpp: In function ‘void Build()’: user.cpp:66:32: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] for(j = 1; j <= T-(1<<i-1)+1; ++j) ^ user.cpp:69:52: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] if(h[ rmq[i][j] ] > h[ rmq[i-1][j+(1<<i-1)] ]) rmq[i][j] = rmq[i-1][j+(1<<i-1)]; ^ user.cpp:69:88: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] if(h[ rmq[i][j] ] > h[ rmq[i-1][j+(1<<i-1)] ]) rmq[i][j] = rmq[i-1][j+(1<<i-1)]; ^ user.cpp: In function ‘int main()’: user.cpp:143:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,x,y; ^ user.cpp:145:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d",&N,&M); ^ user.cpp:148:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d",&x,&y); ^ user.cpp:157:55: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d %d",&v[i].Z,&v[i].A,&v[i].B); ^