Compilare: main.cpp: In function 'int main()': main.cpp:20:58: warning: suggest parentheses around '-' inside '<<' [-Wparentheses] seg[i][j]=min(seg[i-1][j], seg[i-1][j + (1<<i-1)]); ~^~ main.cpp:4:21: note: in definition of macro 'min' #define min(a, b) a<b?a:b ^ main.cpp:20:58: warning: suggest parentheses around '-' inside '<<' [-Wparentheses] seg[i][j]=min(seg[i-1][j], seg[i-1][j + (1<<i-1)]); ~^~ main.cpp:4:25: note: in definition of macro 'min' #define min(a, b) a<b?a:b ^ main.cpp:12:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n, &m); ^ main.cpp:16:36: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", seg[0]+i); ^ main.cpp:24:36: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &i, &j); ^