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Submission #981494

# Submission time Handle Problem Language Result Execution time Memory
981494 2024-05-13T09:23:50 Z boyliguanhan The Big Prize (IOI17_prize) C++17
100 / 100
 31 ms 2336 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 956 KB Output is correct
2 Correct 3 ms 964 KB Output is correct
3 Correct 3 ms 696 KB Output is correct
4 Correct 2 ms 464 KB Output is correct
5 Correct 4 ms 724 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 3 ms 864 KB Output is correct
8 Correct 3 ms 720 KB Output is correct
9 Correct 4 ms 972 KB Output is correct
10 Correct 3 ms 724 KB Output is correct

Subtask #2
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 680 KB Output is correct
2 Correct 3 ms 968 KB Output is correct
3 Correct 3 ms 720 KB Output is correct
4 Correct 3 ms 724 KB Output is correct
5 Correct 3 ms 468 KB Output is correct
6 Correct 0 ms 428 KB Output is correct
7 Correct 3 ms 952 KB Output is correct
8 Correct 2 ms 960 KB Output is correct
9 Correct 3 ms 692 KB Output is correct
10 Correct 3 ms 988 KB Output is correct
11 Correct 2 ms 704 KB Output is correct
12 Correct 3 ms 436 KB Output is correct
13 Correct 0 ms 440 KB Output is correct
14 Correct 5 ms 692 KB Output is correct
15 Correct 22 ms 1560 KB Output is correct
16 Correct 4 ms 984 KB Output is correct
17 Correct 21 ms 1380 KB Output is correct
18 Correct 1 ms 432 KB Output is correct
19 Correct 23 ms 1760 KB Output is correct
20 Correct 13 ms 992 KB Output is correct
21 Correct 19 ms 1612 KB Output is correct
22 Correct 21 ms 1184 KB Output is correct
23 Correct 3 ms 736 KB Output is correct
24 Correct 3 ms 700 KB Output is correct
25 Correct 10 ms 1840 KB Output is correct
26 Correct 10 ms 1212 KB Output is correct
27 Correct 4 ms 716 KB Output is correct
28 Correct 2 ms 700 KB Output is correct
29 Correct 2 ms 724 KB Output is correct
30 Correct 0 ms 436 KB Output is correct
31 Correct 31 ms 1188 KB Output is correct
32 Correct 1 ms 436 KB Output is correct
33 Correct 0 ms 344 KB Output is correct
34 Correct 15 ms 1572 KB Output is correct
35 Correct 3 ms 984 KB Output is correct
36 Correct 21 ms 1096 KB Output is correct
37 Correct 2 ms 972 KB Output is correct
38 Correct 4 ms 1488 KB Output is correct
39 Correct 20 ms 1128 KB Output is correct
40 Correct 0 ms 432 KB Output is correct
41 Correct 10 ms 1408 KB Output is correct
42 Correct 11 ms 1292 KB Output is correct
43 Correct 12 ms 1304 KB Output is correct
44 Correct 15 ms 1884 KB Output is correct
45 Correct 14 ms 1328 KB Output is correct
46 Correct 25 ms 2336 KB Output is correct
47 Correct 12 ms 1120 KB Output is correct
48 Correct 9 ms 716 KB Output is correct
49 Correct 25 ms 1560 KB Output is correct
50 Correct 0 ms 440 KB Output is correct
51 Correct 16 ms 1816 KB Output is correct
52 Correct 26 ms 1516 KB Output is correct
53 Correct 2 ms 716 KB Output is correct
54 Correct 15 ms 1792 KB Output is correct
55 Correct 26 ms 1536 KB Output is correct
56 Correct 0 ms 436 KB Output is correct
57 Correct 6 ms 1012 KB Output is correct
58 Correct 7 ms 1060 KB Output is correct
59 Correct 10 ms 1516 KB Output is correct
60 Correct 9 ms 1488 KB Output is correct
61 Correct 2 ms 720 KB Output is correct
62 Correct 3 ms 1216 KB Output is correct
63 Correct 2 ms 948 KB Output is correct
64 Correct 3 ms 892 KB Output is correct
65 Correct 0 ms 440 KB Output is correct
66 Correct 3 ms 688 KB Output is correct
67 Correct 1 ms 692 KB Output is correct
68 Correct 2 ms 716 KB Output is correct
69 Correct 2 ms 720 KB Output is correct
70 Correct 1 ms 436 KB Output is correct
71 Correct 22 ms 1488 KB Output is correct
72 Correct 3 ms 1216 KB Output is correct
73 Correct 22 ms 1640 KB Output is correct
74 Correct 21 ms 1868 KB Output is correct
75 Correct 3 ms 1000 KB Output is correct
76 Correct 20 ms 1320 KB Output is correct
77 Correct 23 ms 2188 KB Output is correct
78 Correct 2 ms 688 KB Output is correct
79 Correct 11 ms 1048 KB Output is correct
80 Correct 28 ms 1800 KB Output is correct
81 Correct 30 ms 1848 KB Output is correct
82 Correct 26 ms 1824 KB Output is correct
83 Correct 3 ms 708 KB Output is correct
84 Correct 22 ms 1428 KB Output is correct
85 Correct 19 ms 2068 KB Output is correct
86 Correct 2 ms 692 KB Output is correct
87 Correct 1 ms 436 KB Output is correct
88 Correct 2 ms 436 KB Output is correct
89 Correct 3 ms 1212 KB Output is correct
90 Correct 2 ms 944 KB Output is correct
91 Correct 2 ms 688 KB Output is correct
92 Correct 2 ms 440 KB Output is correct
93 Correct 4 ms 704 KB Output is correct
94 Correct 4 ms 740 KB Output is correct
95 Correct 7 ms 980 KB Output is correct
96 Correct 3 ms 1180 KB Output is correct
97 Correct 3 ms 948 KB Output is correct