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Submission #937300

# Submission time Handle Problem Language Result Execution time Memory
937300 2024-03-03T19:14:16 Z snpmrnhlol The Big Prize (IOI17_prize) C++17
0 / 100
 3 ms 600 KB 
#include "prize.h"
#include <bits/stdc++.h>
using namespace std;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int K = 475;
const int N = 2e5;
const int L = 5000;
const int mod = 998244353;
set <int> s;
int l2[N],r2[N];
int cnt = 0;
int mx = 0;
int qcount = 0;
int ans = -1;
int seed = 17;
int f(){
    return rng()%mod;
    seed = 1ll*seed*seed%mod;
    return seed;
}
void solve(int l,int r,int dl,int dr){
    if(dl + dr >= mx)return;
    if(l > r)return;
    //cout<<l<<' '<<r<<' '<<dl<<' '<<dr<<'\n';
    int mij = (l + r)/2;
    for(int i = mij;i <= r;i++){
        auto x = ask(i);
        if(x[0] + x[1] == mx){
            x[0]-=dl;
            x[1]-=dr;
            solve(i + 1,r,x[0] + dl,dr);
            if(ans != -1)return;
            solve(l,mij - 1,dl,dr + x[1] + i - mij);
            return;
        }else{
            if(x[0] + x[1] == 0){
                ans = i;
                return;
            }
        }
    }
    solve(l,mij - 1,dl,dr);
    return;
}
int find_best(int n) {
    int last = 0;
    for(int i = 0;i < K;i++){
        int id = f()%n;
        //cout<<id<<'\n';
        auto x = ask(id);
        int nr = x[0] + x[1];
        if(nr == 0)return id;
        if(nr > mx){
            mx = nr;
            cnt = 1;
        }else if(nr == mx){
            cnt++;
        }
        last = i;
        if(mx > (int)sqrt(n))break;
    }
    solve(last + 1,n - 1,last - cnt + 1,0);
	return ans;
}
/**
8
3 3 3 3 2 2 2 1
**/

Subtask #1
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 344 KB Output is correct
2 Correct 2 ms 344 KB Output is correct
3 Correct 2 ms 344 KB Output is correct
4 Correct 3 ms 344 KB Output is correct
5 Correct 2 ms 344 KB Output is correct
6 Incorrect 2 ms 596 KB Integer -1 violates the range [0, 199999]
7 Halted 0 ms 0 KB -

Subtask #2
0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 344 KB Output is correct
2 Correct 2 ms 344 KB Output is correct
3 Correct 2 ms 600 KB Output is correct
4 Correct 2 ms 344 KB Output is correct
5 Correct 2 ms 344 KB Output is correct
6 Incorrect 2 ms 344 KB Integer -1 violates the range [0, 199999]
7 Halted 0 ms 0 KB -