Submission #662819

#	Time	Username	Problem	Language	Result	Execution time	Memory
662819		Alma	Cave (IOI13_cave)	C++17	Compilation error	0 ms	0 KiB

cave

#include "cave.h"

void exploreCave(int N) {
    memset(S, 0, sizeof S);
    memset(D, -1, sizeof D);

    for (int i = 0; i < N; i++) {

        for (int j = 0; j < N; j++) {
            if (D[j] != -1) {
                A[j] = S[D[j]];
            } else {
                A[j] = 1;
            }
        }

        int ret = tryCombination(A);
        int target;
        if (ret == i) {
            target = 0;
        } else {
            target = 1;
        } 

        int lo = 0, mid, res = -1, hi = N-1;
        while (lo <= hi) {

            mid = (lo+hi) / 2;
            for (int j = 0; j < N; j++) {
                if (D[j] != -1) continue;
                if (j < mid) {
                    A[j] = target;
                } else {
                    A[j] = 1 - target;
                }
            }

            ret = tryCombination(A);
            if (ret == i) {
                lo = mid+1;
            } else {
                res = mid;
                hi = mid-1;
            }
        }

        S[i] = target;
        D[i] = res;
    }

    answer(S, D);
}

Compilation message (stderr)

cave.cpp: In function 'void exploreCave(int)':
cave.cpp:4:12: error: 'S' was not declared in this scope
    4 |     memset(S, 0, sizeof S);
      |            ^
cave.cpp:4:5: error: 'memset' was not declared in this scope
    4 |     memset(S, 0, sizeof S);
      |     ^~~~~~
cave.cpp:2:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    1 | #include "cave.h"
  +++ |+#include <cstring>
    2 | 
cave.cpp:5:12: error: 'D' was not declared in this scope
    5 |     memset(D, -1, sizeof D);
      |            ^
cave.cpp:11:17: error: 'A' was not declared in this scope
   11 |                 A[j] = S[D[j]];
      |                 ^
cave.cpp:13:17: error: 'A' was not declared in this scope
   13 |                 A[j] = 1;
      |                 ^
cave.cpp:17:34: error: 'A' was not declared in this scope
   17 |         int ret = tryCombination(A);
      |                                  ^