Compilare: user.c:8:5: warning: built-in function ‘log’ declared as non-function [enabled by default] int log[1000]; ^ user.c: In function ‘main’: user.c:76:60: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] rmq[i][j][q]=maxim4(rmq[i][j][q-1],rmq[i][j-1<<(q-1)][q-1],rmq[i-1<<(q-1)][j-1<<(q-1)][q-1],rmq[i-1<<(q-1)][j][q-1]); ^ user.c:76:81: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] rmq[i][j][q]=maxim4(rmq[i][j][q-1],rmq[i][j-1<<(q-1)][q-1],rmq[i-1<<(q-1)][j-1<<(q-1)][q-1],rmq[i-1<<(q-1)][j][q-1]); ^ user.c:76:93: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] rmq[i][j][q]=maxim4(rmq[i][j][q-1],rmq[i][j-1<<(q-1)][q-1],rmq[i-1<<(q-1)][j-1<<(q-1)][q-1],rmq[i-1<<(q-1)][j][q-1]); ^ user.c:76:114: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] rmq[i][j][q]=maxim4(rmq[i][j][q-1],rmq[i][j-1<<(q-1)][q-1],rmq[i-1<<(q-1)][j-1<<(q-1)][q-1],rmq[i-1<<(q-1)][j][q-1]); ^ user.c:42:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d%d",&n,&m,&k); ^ user.c:84:19: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d%d%d",&l1,&c1,&l2,&c2); ^