View Compilation Error

0_0_15011008_21949.cpp: In function 'int main()':
0_0_15011008_21949.cpp:20:25: error: 'scanf' was not declared in this scope
     int T; scanf("%d",&T);
                         ^
0_0_15011008_21949.cpp:33:25: error: 'fill' was not declared in this scope
         fill(g,g+N-L,INF);
                         ^
0_0_15011008_21949.cpp:36:44: error: 'lower_bound' was not declared in this scope
             k = lower_bound(g,g+N-i-1,-a[i])-g;
                                            ^
0_0_15011008_21949.cpp:45:39: error: 'lower_bound' was not declared in this scope
          kk = lower_bound(g,g+i-L,a[i])-g;
                                       ^
0_0_15011008_21949.cpp:46:25: error: 'max' was not declared in this scope
    s=max(s,(kk-1)+1+f[i]);
                         ^
0_0_15011008_21949.cpp:50:36: error: 'printf' was not declared in this scope
        printf("Case #%d: %d\n",ks,s);
                                    ^