oj.uz

Submission #333430

# Submission time Handle Problem Language Result Execution time Memory
333430 2020-12-05T23:02:44 Z gmyu Secret (JOI14_secret) C++14
0 / 100
 514 ms 4892 KB 
/*
ID: USACO_template
LANG: C++
PROG: USACO
*/
#include <iostream>  //cin , cout
#include <fstream>   //fin, fout
#include <stdio.h>   // scanf , pringf
#include <cstdio>
#include <algorithm> // sort , stuff
#include <stack>     // stacks
#include <queue>     // queues
#include <map>
#include <string>

#include "secret.h"

using namespace std;

typedef pair<int, int>          pii;
typedef vector<int>             vi;     /// adjlist without weight
typedef vector<pii>             vii;    /// adjlist with weight
typedef vector<pair<int,pii>>   vpip;   /// edge with weight
typedef long long               ll;

#define mp  make_pair
#define fst first
#define snd second
#define pb  push_back
#define trav(u, adj_v) for (auto& u: adj_v)

const int MOD = 1e9+7;  // 998244353;
const int MX  = 2e5+5;   //
const ll  INF = 1e18;    //

#define MAXV 1007
#define MAXE 100007

const int xdir[4] = {1,0,-1,0}, ydir[4] = {0,1,0,-1}; /// 4 directions
struct NODE {
    int x, y;
    int val;
    int visited;
    bool operator< (NODE b) const { return (x == b.x) ? (y < b.y) : (x < b.x); }
};
struct EDGE {
    int from, to;
    ll weight;
    bool operator<(EDGE other) const { return weight < other.weight; }
};

/// code from USACO examples
void setIO(string name) {
    ios_base::sync_with_stdio(0); cin.tie(0);
    freopen((name+".in").c_str(),"r",stdin);
    freopen((name+".out").c_str(),"w",stdout);
}
bool debug = false, submit = true;

/**
* RMQ use sparse table, O(N log N) memory and setip, O(1) query
* https://usaco.guide/plat/DC-SRQ
*/
int rqN;
vi x;
map<pair<int, int>, int> ans;

int rq[12][MAXV], rqmask[MAXV];      /// 18 = ceil(log2(n))

int getAns(int v1, int v2) {
    if(v1>v2) swap(v1, v2);
    pii vp = mp(v1, v2);
    if(ans.find(vp) == ans.end()) ans[vp] = Secret(v1, v2);
    return ans[vp];
}

void divi(int l, int r, int lev = 0) { // generate dat and mask
    if (l == r) return;
    int m = (l+r)/2;
    rq[lev][m] = x[m]; for(int i = m-1; i >= l; i--) rq[lev][i] = getAns(x[i], rq[lev][i+1]);
    rq[lev][m+1] = x[m+1]; for(int i = m+2; i <= r; i++) rq[lev][i] = getAns(rq[lev][i-1], x[i]);
    for(int i = m+1; i <= r; i++) rqmask[i] ^= 1<<lev;
    divi(l,m,lev+1); divi(m+1,r,lev+1);
}
int que(int l, int r) {         /// [ , ]
    if(l == r) return x[l];
    int bits = __builtin_ctz(rqmask[l]^rqmask[r]);
    return getAns(rq[bits][l], rq[bits][r]);
}

void Init(int N, int A[]) {
    rqN = N;
    for(int i = 0; i < N; i++) x.pb(A[i]);
    divi(0, N-1);
}
int Query(int L, int R) {
    return que(L, R);
}

Compilation message

secret.cpp: In function 'void setIO(std::string)':
secret.cpp:55:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   55 |     freopen((name+".in").c_str(),"r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
secret.cpp:56:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   56 |     freopen((name+".out").c_str(),"w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 147 ms 2776 KB Wrong Answer: Query(222, 254) - expected : 34031541, actual : 844516862.
2 Incorrect 133 ms 2616 KB Wrong Answer: Query(60, 375) - expected : 669221184, actual : 880320712.
3 Incorrect 136 ms 2776 KB Wrong Answer: Query(211, 401) - expected : 674373968, actual : 808570902.
4 Incorrect 500 ms 4844 KB Wrong Answer: Query(90, 497) - expected : 397934825, actual : 360218693.
5 Incorrect 504 ms 4844 KB Wrong Answer: Query(587, 915) - expected : 752404486, actual : 529006930.
6 Incorrect 498 ms 4772 KB Wrong Answer: Query(738, 741) - expected : 983692994, actual : 850129153.
7 Incorrect 511 ms 4852 KB Wrong Answer: Query(84, 976) - expected : 742463504, actual : 194162714.
8 Incorrect 514 ms 4872 KB Wrong Answer: Query(58, 987) - expected : 20022464, actual : 215212056.
9 Incorrect 512 ms 4864 KB Wrong Answer: Query(33, 967) - expected : 676869696, actual : 836644132.
10 Incorrect 506 ms 4892 KB Wrong Answer: Query(116, 961) - expected : 68487362, actual : 336488781.