Submission #22788

#	Time	Username	Problem	Language	Result	Execution time	Memory
22788		Jongwon Party (#40)	Window Xor (KRIII5_WX)	C++14	Compilation error	0 ms	0 KiB

WX

#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <algorithm>
#include <vector>

using namespace std;

typedef vector<int> V;

int n;

V pro(V &a, V &b)
{
    V r, t;

    for(int &x: a)
        for(int &y: b)
            r.push_back((0LL+x+y) % n);

    sort(r.begin(), r.end());

    if(r.size() == 1)
        return r;

    bool c = 0;
    for(int i = 0; i<r.size(); i++)
    {
        if(i != 0 && r[i-1] != r[i])
        {
            if(c)
                t.push_back(r[i-1]);
            c = 1;
        }
        else
            c = !c;
    }
    if(c)
        t.push_back(r[r.size()-1]);

    return t;
}

V exp(V &a, long long t)
{
    if(t == 1)
        return a;

    if(t%2)
        return pro(exp(a, t-1), a);

    V h = exp(a, t/2);
    return pro(h, h);
}

int arr[100000];
int res[100000];

int main()
{
    //freopen("in.txt", "r", stdin);
    //freopen("out.txt", "w", stdout);

    int k, i, j;
    long long t;
    scanf("%d%d%lld", &n, &k, &t);
    for(i = 0; i<n; i++)
        scanf("%d", &arr[i]);

    V a;

    for(i = 0; i<k; i++)
        a.push_back(i);

    a = exp(a, t);

    //for(int &x: a)
    //    res[0] ^= arr[x];

    for(i = 0; i<n; i++)
    {
        for(int &x: a)
            res[i] ^= arr[(x+i)%n];
    }

    for(i = 0; i<n; i++)
        printf("%d ", res[i]);
    return 0;
}

Compilation message (stderr)

WX.cpp: In function 'V pro(V&, V&)':
WX.cpp:27:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0; i<r.size(); i++)
                     ^
WX.cpp: In function 'V exp(V&, long long int)':
WX.cpp:50:23: error: invalid initialization of non-const reference of type 'V& {aka std::vector<int>&}' from an rvalue of type 'V {aka std::vector<int>}'
         return pro(exp(a, t-1), a);
                       ^
WX.cpp:13:3: note:   initializing argument 1 of 'V pro(V&, V&)'
 V pro(V &a, V &b)
   ^
WX.cpp: In function 'int main()':
WX.cpp:64:15: warning: unused variable 'j' [-Wunused-variable]
     int k, i, j;
               ^
WX.cpp:66:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d%lld", &n, &k, &t);
                                  ^
WX.cpp:68:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &arr[i]);
                             ^