Compilare: main.cpp: In function 'void Build_RMQ()': main.cpp:57:62: warning: suggest parentheses around '-' inside '<<' [-Wparentheses] if(val[ rmq[i-1][j] ] > val[ rmq[i-1][j + (1 << i-1)]]) rmq[i][j] = rmq[i-1][j + (1 << i-1)]; ~^~ main.cpp:57:101: warning: suggest parentheses around '-' inside '<<' [-Wparentheses] if(val[ rmq[i-1][j] ] > val[ rmq[i-1][j + (1 << i-1)]]) rmq[i][j] = rmq[i-1][j + (1 << i-1)]; ~^~ main.cpp: In function 'int main()': main.cpp:143:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d", &N, &K); ^ main.cpp:146:44: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d %d", &x, &c, &y); ^