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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#740674#9432. Permutation-xcxxx-Compile Error//C++142.9kb2024-11-13 11:03:192024-11-13 11:03:20

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  • [2024-11-13 11:03:20]
  • 评测
  • [2024-11-13 11:03:19]
  • 提交

answer

#include<bits/stdc++.h>
#define rep(i,l,r) for(int i=(l);i<=(r);i++)
#define per(i,r,l) for(int i=(r);i>=(l);i--)
using namespace std;
int rd() {int x=0,f=1;char c=getchar();while(!isdigit(c))f=(c=='-'?-1:f),c=getchar();while(isdigit(c))x=x*10+c-'0',c=getchar();return x*f;}
const int N=1005;
int n,p[N],ans[N];
int out[N];
#ifdef ONLINE_JUDGE
void init() {
}
int query(vector<int> ask) {
    rep(i,0,n-1) out[p[i+1]]=ask[i];
    printf("0 ");rep(i,1,n)printf("%d ",out[i]);
    puts(""),fflush(stdout);
    int res;cin>>res;
    return res;
}
#endif
#ifndef ONLINE_JUDGE
int a[N],qcnt;
void init() {
    rep(i,1,n) a[i]=i;
    random_shuffle(a+1,a+1+n);
    printf("ANS: ");rep(i,1,n) printf("%d ",a[i]);puts("");
}
int query(vector<int> ask) {
    qcnt++;
    rep(i,0,n-1) out[p[i+1]]=ask[i];
    printf("0 ");rep(i,1,n)printf("%d ",out[i]);
    puts(""),fflush(stdout);
    int cnt=0;
    rep(i,1,n) cnt+=out[i]==a[i];
    printf("%d\n",cnt);
    return cnt;
}
#endif
void solve(int l,int r,vector<int> now,int out=-1) {
    fprintf(stderr,"l=%d r=%d\n",l,r);
    if(l==r) {
        ans[p[l]]=now[0];
        return;
    }
    int mid=(l+r)>>1;
    vector<int> L,R,unknown;
    unknown.push_back(now.back());
    now.pop_back();
    for(int x:now) {
        if(L.size()==mid-l+1) {R.push_back(x);continue;}
        if(R.size()==r-mid) {L.push_back(x);continue;}
        vector<int> ask;
        if(!unknown.empty()) {
            rep(i,l,mid) ask.push_back(x);
            rep(i,mid+1,r) ask.push_back(unknown.front());
            int val=query(ask);
            if(val==0) {
                R.push_back(x);
                for(int y:unknown) L.push_back(y);
                unknown.clear();
            }
            if(val==2) {
                L.push_back(x);
                for(int y:unknown) R.push_back(y);
                unknown.clear();
            }
            if(val==1) unknown.push_back(x);
        }
        else if(!L.empty()) {
            rep(i,l,mid) ask.push_back(x);
            rep(i,mid+1,r) ask.push_back(L.front());
            if(query(ask)) L.push_back(x);
            else R.push_back(x);
        }
        else if(!R.empty()) {
            rep(i,l,mid) ask.push_back(R.front());
            rep(i,mid+1,r) ask.push_back(x);
            if(query(ask)) R.push_back(x);
            else L.push_back(x);
        }
    }
    if(L.size()<mid-l+1) for(int x:unknown) L.push_back(x);
    if(R.size()<r-mid) for(int x:unknown) R.push_back(x);
    solve(l, mid ,L,R.front());
    solve(mid+1,r,R,L.front());
}
signed main() {
    freopen("K.out","w",stdout);
    n=rd();
    init();
    rep(i,1,n) p[i]=i;
    random_shuffle(p+1,p+1+n);
    vector<int> now;
    rep(i,1,n) now.push_back(i);
    solve(1,n,now);
    printf("1 ");
    rep(i,1,n) printf("%d ",ans[i]);
    fprintf(stderr,"%d queries\n",qcnt);
    return 0;
}
//g++ -fsanitize=address,undefined -Wall -std=c++14 -O2 -o K K.cpp

Details

answer.code: In function ‘int main()’:
answer.code:97:35: error: ‘qcnt’ was not declared in this scope
   97 |     fprintf(stderr,"%d queries\n",qcnt);
      |                                   ^~~~
answer.code:87:12: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   87 |     freopen("K.out","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~