Submission #293277

#	Time	Username	Problem	Language	Result	Execution time	Memory
293277		RedNextCentury	Secret (JOI14_secret)	C++14	100 / 100	517 ms	9192 KiB

secret

#include "secret.h"
#include<bits/stdc++.h>
using namespace std;
vector<int> centers;
vector<int> start, finish;
int val[2002][2002];
int a[2002];
int num=0;
//int Secret(int l,int r){return 0;}
void DC(int L,int R) {
    if (L>R) return;
    else {
        int mid = (L+R)/2;
        centers.push_back(mid);
        start.push_back(L);
        finish.push_back(R);
        val[mid][mid]=a[mid];
        for (int i=mid-1;i>=L;i--) val[i][mid] = Secret(a[i], val[i+1][mid]);
        val[mid+1][mid+1]=a[mid+1];
        for (int i=mid+2;i<=R;i++) val[mid+1][i] = Secret(val[mid+1][i-1], a[i]);
        DC(L, mid-1);
        DC(mid+1,R);
    }
}
 
void Init(int N, int A[]) {
    for (int i=0;i<N;i++) a[i] = A[i];
    DC(0, N-1);
}
 
int Query(int L, int R) {
  for (int i=0;i<centers.size();i++) {
    if (start[i]<=L && finish[i]>=R && centers[i]<=R && centers[i]>=L) {
        if (L==centers[i]+1 || R==centers[i]) return val[L][R];
        return Secret(val[L][centers[i]], val[centers[i]+1][R]);
    }
  }
}
 

Compilation message (stderr)

secret.cpp: In function 'int Query(int, int)':
secret.cpp:32:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |   for (int i=0;i<centers.size();i++) {
      |                ~^~~~~~~~~~~~~~~
secret.cpp:38:1: warning: control reaches end of non-void function [-Wreturn-type]
   38 | }
      | ^

• Subtask 1: 100 / 100