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Submission #981447

# Submission time Handle Problem Language Result Execution time Memory
981447 2024-05-13T08:25:20 Z vjudge1 The Big Prize (IOI17_prize) C++17
100 / 100
 29 ms 2076 KB 
//viewed solution
#include "prize.h"
#include<bits/stdc++.h>
using namespace std;
int unloli,ans=-1;
map<int,vector<int>> mem;
vector<int>ask2(int n){
    if(mem.count(n))
        return mem[n];
    return mem[n]=ask(n);
}
void calc(int l,int r,int tol,int tor){
    if(ans>=0)
        return;
    if(l>r)
        return;
    if(tol+tor==unloli)
        return;
    if(tol+tor+r-l+1==unloli){
        for(int i=l;i<=r;i++) {
            vector<int>x=ask2(i);
            if(x[0]+x[1]==0) {
                ans=i;
                return;
            }
        }
        return;
    }
    int mid=l+r>>1,pt=mid;
    vector<int>stuff=ask2(mid);
    if(stuff[0]+stuff[1]==0){
        ans=mid;
        return;
    }
    while(stuff[0]+stuff[1]-unloli&&pt>l){
        stuff=ask2(--pt);
        if(stuff[0]+stuff[1]==0){
            ans=pt;
            return;
        }
    }
    if(stuff[0]+stuff[1]==unloli)
        calc(mid+1,r,stuff[0],tor),
        calc(l,pt-1,tol,stuff[1]);
    else {
        stuff=ask2(++mid);
        if(stuff[0]+stuff[1]==0) {
            ans=mid;
            return;
        }
        while(stuff[0]+stuff[1]-unloli){
            stuff=ask2(++mid);
            if(stuff[0]+stuff[1]==0) {
                ans=mid;
                return;
            }
        }
        calc(mid+1,r,stuff[0],tor);
    }
}
int find_best(int n) {
    if(n<5002) {
        for(int i = 1; i < n; i++) {
            std::vector<int> res = ask2(i);
            if(res[0] + res[1] == 0)    
                return i;
        }
	    return 0;
    }
    map<int,int>cnt;
    int to=473;
    for(int i=0;i<to;i++){
        vector<int>x=ask2(i);
        if(x[0]+x[1]==0)
            return i;
        cnt[x[0]+x[1]]++;
        unloli=max(unloli,x[0]+x[1]);
        if(unloli>27)
            to=i+1;
    }
    int s=0;
    for(auto[i,j]:cnt)
        s+=(i<unloli)*j;
    calc(to,n-1,s,0);
    return ans;
}

Compilation message

prize.cpp: In function 'void calc(int, int, int, int)':
prize.cpp:29:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   29 |     int mid=l+r>>1,pt=mid;
      |             ~^~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 1212 KB Output is correct
2 Correct 2 ms 712 KB Output is correct
3 Correct 2 ms 700 KB Output is correct
4 Correct 2 ms 696 KB Output is correct
5 Correct 2 ms 728 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 2 ms 968 KB Output is correct
8 Correct 3 ms 692 KB Output is correct
9 Correct 2 ms 956 KB Output is correct
10 Correct 2 ms 732 KB Output is correct

Subtask #2
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 704 KB Output is correct
2 Correct 2 ms 720 KB Output is correct
3 Correct 2 ms 692 KB Output is correct
4 Correct 2 ms 700 KB Output is correct
5 Correct 2 ms 964 KB Output is correct
6 Correct 0 ms 544 KB Output is correct
7 Correct 3 ms 972 KB Output is correct
8 Correct 3 ms 968 KB Output is correct
9 Correct 2 ms 460 KB Output is correct
10 Correct 3 ms 744 KB Output is correct
11 Correct 1 ms 464 KB Output is correct
12 Correct 2 ms 464 KB Output is correct
13 Correct 1 ms 436 KB Output is correct
14 Correct 4 ms 948 KB Output is correct
15 Correct 22 ms 1592 KB Output is correct
16 Correct 6 ms 980 KB Output is correct
17 Correct 19 ms 2076 KB Output is correct
18 Correct 0 ms 436 KB Output is correct
19 Correct 21 ms 1216 KB Output is correct
20 Correct 8 ms 1340 KB Output is correct
21 Correct 13 ms 1040 KB Output is correct
22 Correct 13 ms 1236 KB Output is correct
23 Correct 3 ms 740 KB Output is correct
24 Correct 2 ms 468 KB Output is correct
25 Correct 9 ms 992 KB Output is correct
26 Correct 8 ms 828 KB Output is correct
27 Correct 2 ms 484 KB Output is correct
28 Correct 1 ms 440 KB Output is correct
29 Correct 2 ms 700 KB Output is correct
30 Correct 0 ms 436 KB Output is correct
31 Correct 20 ms 1948 KB Output is correct
32 Correct 1 ms 440 KB Output is correct
33 Correct 0 ms 344 KB Output is correct
34 Correct 15 ms 1808 KB Output is correct
35 Correct 3 ms 952 KB Output is correct
36 Correct 25 ms 1004 KB Output is correct
37 Correct 2 ms 720 KB Output is correct
38 Correct 3 ms 720 KB Output is correct
39 Correct 11 ms 1348 KB Output is correct
40 Correct 1 ms 440 KB Output is correct
41 Correct 9 ms 1384 KB Output is correct
42 Correct 11 ms 752 KB Output is correct
43 Correct 9 ms 1376 KB Output is correct
44 Correct 12 ms 1700 KB Output is correct
45 Correct 16 ms 1564 KB Output is correct
46 Correct 22 ms 1780 KB Output is correct
47 Correct 11 ms 724 KB Output is correct
48 Correct 6 ms 996 KB Output is correct
49 Correct 21 ms 1196 KB Output is correct
50 Correct 1 ms 428 KB Output is correct
51 Correct 14 ms 1436 KB Output is correct
52 Correct 23 ms 988 KB Output is correct
53 Correct 2 ms 724 KB Output is correct
54 Correct 16 ms 1100 KB Output is correct
55 Correct 22 ms 1772 KB Output is correct
56 Correct 0 ms 432 KB Output is correct
57 Correct 6 ms 1056 KB Output is correct
58 Correct 6 ms 1016 KB Output is correct
59 Correct 9 ms 1340 KB Output is correct
60 Correct 9 ms 1256 KB Output is correct
61 Correct 2 ms 720 KB Output is correct
62 Correct 3 ms 948 KB Output is correct
63 Correct 2 ms 716 KB Output is correct
64 Correct 2 ms 488 KB Output is correct
65 Correct 1 ms 440 KB Output is correct
66 Correct 2 ms 704 KB Output is correct
67 Correct 1 ms 440 KB Output is correct
68 Correct 2 ms 716 KB Output is correct
69 Correct 2 ms 468 KB Output is correct
70 Correct 1 ms 436 KB Output is correct
71 Correct 23 ms 1852 KB Output is correct
72 Correct 2 ms 736 KB Output is correct
73 Correct 26 ms 1508 KB Output is correct
74 Correct 21 ms 1324 KB Output is correct
75 Correct 3 ms 980 KB Output is correct
76 Correct 23 ms 1116 KB Output is correct
77 Correct 23 ms 1572 KB Output is correct
78 Correct 2 ms 688 KB Output is correct
79 Correct 13 ms 1496 KB Output is correct
80 Correct 23 ms 2056 KB Output is correct
81 Correct 29 ms 1572 KB Output is correct
82 Correct 27 ms 1340 KB Output is correct
83 Correct 3 ms 692 KB Output is correct
84 Correct 19 ms 1732 KB Output is correct
85 Correct 23 ms 1236 KB Output is correct
86 Correct 2 ms 968 KB Output is correct
87 Correct 1 ms 440 KB Output is correct
88 Correct 2 ms 1144 KB Output is correct
89 Correct 2 ms 944 KB Output is correct
90 Correct 2 ms 436 KB Output is correct
91 Correct 1 ms 692 KB Output is correct
92 Correct 3 ms 436 KB Output is correct
93 Correct 3 ms 980 KB Output is correct
94 Correct 6 ms 696 KB Output is correct
95 Correct 3 ms 1248 KB Output is correct
96 Correct 4 ms 744 KB Output is correct
97 Correct 2 ms 976 KB Output is correct