Compilare: main.cpp: In function 'void RMQ()': main.cpp:48:58: warning: suggest parentheses around '-' inside '<<' [-Wparentheses] rmq[i][j] = max(rmq[i-1][j], rmq[i-1][j + (1 << i-1)]); ~^~ main.cpp: In function 'int main()': main.cpp:63:33: 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:66:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &nr[i]); ^ main.cpp:69:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &x); ^ main.cpp:81:44: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d %d", &x, &y, &t); ^