oj.uz

Submission #915913

# Submission time Handle Problem Language Result Execution time Memory
915913 2024-01-24T21:51:42 Z nightfal Ancient Books (IOI17_books) C++14
42 / 100
 898 ms 1048576 KB 
#include <cstdio>
#include <vector>
#include <cassert>
#include <cstdlib>
#include <tuple>
#include <climits>

using namespace std;

bool isSubtask3(int s) {return s==0;}
bool isSubtask4(int n) {return n<=1000;}

long long subtask3(vector<int> p, int s = 0, int e = -1 , int dir = 1) {
    int n = p.size(), last = s;
    if (e==-1) e = n-1;
    long long total = 0;

    for(int i=s; dir==1 && i<=e || dir==-1 && i>=e; i += dir) {
        if (i==p[i]) continue;
        if (dir*(i-last) > 0) total += abs(i-last)*2;
        total += abs(p[i]-i);
        last = dir==1? max(last,p[i]):min(last,p[i]);
    }
	return total;
}
tuple<int,int,long long> extend(vector<int> p, int l, int r, int lmost, int rmost, int move) {
    int n = p.size();
    while(l> lmost || r < rmost) {
        int idx;
        if (l > max(lmost,0)) idx == --l;
        else if (r < min(rmost,n-1)) idx == ++r;
        move += abs(p[idx]-idx);
        lmost = min(lmost,p[idx]); 
        rmost = max(rmost,p[idx]);
    }
    return make_tuple(l,r,move);
} 
long long cal2(vector<int> p, int l, int r, int lmost, int rmost, long long move, vector<vector<long long>>& dp) {
    if (dp[l][r]) return dp[l][r];
    int n = p.size();
    tie(l,r,move) = extend(p,l,r,lmost,rmost,move);
    dp[l][r] = move;
    if (l>0) dp[l][r] = cal2(p,l-1,r,lmost,rmost,move,dp) + 2;
    if (r<n-1) dp[l][r] = min(dp[l][r],cal2(p,l,r+1,lmost,rmost,move,dp)+2);
    return move;
}
long long cal(vector<int> p, int l, int r, int lmost, int rmost, vector<vector<long long>>& dp) {
    // printf("l=%d, r=%d, lmost=%d, rmost=%d\n",l,r,lmost,rmost);
    // for(auto & row: dp) {for(long long elem: row) printf("%lld ",elem); printf("\n");}
    if (dp[l][r]!=LLONG_MAX) return dp[l][r];
    int n = p.size();
    long long temp1=LLONG_MAX, temp2=LLONG_MAX;
    if (l>0) {
        temp1 = abs(p[l-1]-(l-1));
        if(l-1 < lmost) temp1 += 2;
        int lmostN = min(l-1,p[l-1]);
        lmostN = min(lmost,lmostN);
        int rmostN = max(rmost,p[l-1]);
        temp1 += cal(p,l-1,r,lmostN,rmostN,dp); 
    }
    if (r<n-1) {
        temp2 = abs(p[r+1]-(r+1));
        if(r+1 > rmost) temp2 += 2;
        int lmostN = min(lmost,p[r+1]);
        int rmostN = max(r+1,p[r+1]);
        rmostN = max(rmost,rmostN);
        temp2 += cal(p,l,r+1,lmostN,rmostN,dp); 
    }
    dp[l][r] = min(temp1,temp2);
    // printf("dp[%d][%d]=%lld=min(%lld,%lld), \n",l,r,dp[l][r],temp1,temp2);
    return dp[l][r];
}

long long subtask4(vector<int> p, int s) {
    int n = p.size();
    long long move = 0;

    
    int start; for(start = 0; start < s; start++) if(start!=p[start]) break;
    int end; for(end = n-1; end > s; end--) if(end!=p[end]) break;
    for(int i = 0; i <= end-start; i++) p[i] = p[i+start]-start;
    s -= start; n = end-start+1; p.resize(n); 
    vector<vector<long long>> dp(n,vector<long long>(n,LLONG_MAX));
    dp[0][n-1]=0;
    // printf("s=%d\n",s);
    // printf("p: "); for(int elem: p) printf("%d ", elem); printf("\n");
    
    // for(auto &row: dp) {for(long long elem: row) printf("%lld ",elem); printf("\n");}
    int l=s, r=s, lmost = min(s,p[s]), rmost = max(s,p[s]);
    return cal(p,l,r,lmost,rmost,dp)+abs(p[s]-s);
}

long long fulltask(vector<int> p, int s) {

    int n = p.size(), left = s-1, right = s, leftmost = s-1, rightmost = s;
    long long total=0, sumL=0, sumR=0, moveL=1, moveR=0;

    while(0<=left || right<=n-1) {
        printf("total=%d, sumL=%d, sumR=%d, moveL=%d, moveR=%d\n",total,sumL,sumR,moveL,moveR);
        printf("left=%d, right=%d, leftmost=%d, rightmost=%d\n\n",left,right,leftmost,rightmost);

        if(right <= n-1 && (left < 0 || moveR < moveL || moveR == moveL && right <= rightmost)) {
            if(rightmost < right) moveR++;
            sumR += abs(p[right]-right);
            rightmost = max(rightmost,right);
            rightmost = max(rightmost,p[right]);    
            leftmost  = min(leftmost, p[right]);
            if (leftmost <= left) {moveL = 0; total+=sumR+moveR*2; moveR=0; sumR=0;}
            right++;
        } 
        else if(0 <= left && (right > n-1 || moveR > moveL || moveR == moveL && right > rightmost)) {
            if (left < leftmost) moveL++;
            sumL += abs(p[left]-left); 
            leftmost  = min(leftmost,left);
            leftmost  = min(leftmost, p[left]);
            rightmost = min(rightmost,p[left]);
            if (right <= rightmost) {moveR = 0; total+=sumL+moveL*2; moveL=0; sumL=0;}            
            left--;
        }
    }
    printf("total=%d, sumL=%d, sumR=%d, moveL=%d, moveR=%d\n",total,sumL,sumR,moveL,moveR);
    printf("left=%d, right=%d, leftmost=%d, rightmost=%d\n",left,right,leftmost,rightmost);
 
    if(sumL) total += sumL + moveL; // ??
    if(sumR) total += sumR + moveR; // ??
    return total;
}

long long minimum_walk(std::vector<int> p, int s) {
    // if (isSubtask4(p.size()))
    return subtask4(p,s);
    // if (isSubtask3(s)) return subtask3(p);
    // return fulltask(p,s);
}

Compilation message

books.cpp: In function 'long long int subtask3(std::vector<int>, int, int, int)':
books.cpp:18:25: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   18 |     for(int i=s; dir==1 && i<=e || dir==-1 && i>=e; i += dir) {
      |                  ~~~~~~~^~~~~~~
books.cpp: In function 'std::tuple<int, int, long long int> extend(std::vector<int>, int, int, int, int, int)':
books.cpp:30:35: warning: value computed is not used [-Wunused-value]
   30 |         if (l > max(lmost,0)) idx == --l;
      |                               ~~~~^~~~~~
books.cpp:31:42: warning: value computed is not used [-Wunused-value]
   31 |         else if (r < min(rmost,n-1)) idx == ++r;
      |                                      ~~~~^~~~~~
books.cpp: In function 'long long int subtask4(std::vector<int>, int)':
books.cpp:76:15: warning: unused variable 'move' [-Wunused-variable]
   76 |     long long move = 0;
      |               ^~~~
books.cpp: In function 'long long int fulltask(std::vector<int>, int)':
books.cpp:99:24: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
   99 |         printf("total=%d, sumL=%d, sumR=%d, moveL=%d, moveR=%d\n",total,sumL,sumR,moveL,moveR);
      |                       ~^                                          ~~~~~
      |                        |                                          |
      |                        int                                        long long int
      |                       %lld
books.cpp:99:33: warning: format '%d' expects argument of type 'int', but argument 3 has type 'long long int' [-Wformat=]
   99 |         printf("total=%d, sumL=%d, sumR=%d, moveL=%d, moveR=%d\n",total,sumL,sumR,moveL,moveR);
      |                                ~^                                       ~~~~
      |                                 |                                       |
      |                                 int                                     long long int
      |                                %lld
books.cpp:99:42: warning: format '%d' expects argument of type 'int', but argument 4 has type 'long long int' [-Wformat=]
   99 |         printf("total=%d, sumL=%d, sumR=%d, moveL=%d, moveR=%d\n",total,sumL,sumR,moveL,moveR);
      |                                         ~^                                   ~~~~
      |                                          |                                   |
      |                                          int                                 long long int
      |                                         %lld
books.cpp:99:52: warning: format '%d' expects argument of type 'int', but argument 5 has type 'long long int' [-Wformat=]
   99 |         printf("total=%d, sumL=%d, sumR=%d, moveL=%d, moveR=%d\n",total,sumL,sumR,moveL,moveR);
      |                                                   ~^                              ~~~~~
      |                                                    |                              |
      |                                                    int                            long long int
      |                                                   %lld
books.cpp:99:62: warning: format '%d' expects argument of type 'int', but argument 6 has type 'long long int' [-Wformat=]
   99 |         printf("total=%d, sumL=%d, sumR=%d, moveL=%d, moveR=%d\n",total,sumL,sumR,moveL,moveR);
      |                                                             ~^                          ~~~~~
      |                                                              |                          |
      |                                                              int                        long long int
      |                                                             %lld
books.cpp:102:73: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  102 |         if(right <= n-1 && (left < 0 || moveR < moveL || moveR == moveL && right <= rightmost)) {
      |                                                          ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
books.cpp:111:78: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  111 |         else if(0 <= left && (right > n-1 || moveR > moveL || moveR == moveL && right > rightmost)) {
      |                                                               ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~
books.cpp:121:20: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
  121 |     printf("total=%d, sumL=%d, sumR=%d, moveL=%d, moveR=%d\n",total,sumL,sumR,moveL,moveR);
      |                   ~^                                          ~~~~~
      |                    |                                          |
      |                    int                                        long long int
      |                   %lld
books.cpp:121:29: warning: format '%d' expects argument of type 'int', but argument 3 has type 'long long int' [-Wformat=]
  121 |     printf("total=%d, sumL=%d, sumR=%d, moveL=%d, moveR=%d\n",total,sumL,sumR,moveL,moveR);
      |                            ~^                                       ~~~~
      |                             |                                       |
      |                             int                                     long long int
      |                            %lld
books.cpp:121:38: warning: format '%d' expects argument of type 'int', but argument 4 has type 'long long int' [-Wformat=]
  121 |     printf("total=%d, sumL=%d, sumR=%d, moveL=%d, moveR=%d\n",total,sumL,sumR,moveL,moveR);
      |                                     ~^                                   ~~~~
      |                                      |                                   |
      |                                      int                                 long long int
      |                                     %lld
books.cpp:121:48: warning: format '%d' expects argument of type 'int', but argument 5 has type 'long long int' [-Wformat=]
  121 |     printf("total=%d, sumL=%d, sumR=%d, moveL=%d, moveR=%d\n",total,sumL,sumR,moveL,moveR);
      |                                               ~^                              ~~~~~
      |                                                |                              |
      |                                                int                            long long int
      |                                               %lld
books.cpp:121:58: warning: format '%d' expects argument of type 'int', but argument 6 has type 'long long int' [-Wformat=]
  121 |     printf("total=%d, sumL=%d, sumR=%d, moveL=%d, moveR=%d\n",total,sumL,sumR,moveL,moveR);
      |                                                         ~^                          ~~~~~
      |                                                          |                          |
      |                                                          int                        long long int
      |                                                         %lld
books.cpp: In function 'std::tuple<int, int, long long int> extend(std::vector<int>, int, int, int, int, int)':
books.cpp:32:26: warning: 'idx' is used uninitialized in this function [-Wuninitialized]
   32 |         move += abs(p[idx]-idx);
      |                          ^

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 0 ms 348 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 8 ms 12380 KB Output is correct
20 Correct 8 ms 12380 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 11 ms 12380 KB Output is correct
23 Correct 8 ms 12124 KB Output is correct
24 Correct 9 ms 12200 KB Output is correct
25 Correct 8 ms 12244 KB Output is correct
26 Correct 8 ms 12376 KB Output is correct
27 Correct 10 ms 12380 KB Output is correct
28 Correct 8 ms 12380 KB Output is correct
29 Correct 8 ms 12200 KB Output is correct

Subtask #3
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 8 ms 12380 KB Output is correct
20 Correct 8 ms 12380 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 11 ms 12380 KB Output is correct
23 Correct 8 ms 12124 KB Output is correct
24 Correct 9 ms 12200 KB Output is correct
25 Correct 8 ms 12244 KB Output is correct
26 Correct 8 ms 12376 KB Output is correct
27 Correct 10 ms 12380 KB Output is correct
28 Correct 8 ms 12380 KB Output is correct
29 Correct 8 ms 12200 KB Output is correct
30 Runtime error 459 ms 1048576 KB Execution killed with signal 9
31 Halted 0 ms 0 KB -

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 841 ms 12412 KB Output is correct
2 Correct 126 ms 12440 KB Output is correct
3 Correct 820 ms 12492 KB Output is correct
4 Correct 765 ms 12180 KB Output is correct
5 Correct 868 ms 12392 KB Output is correct
6 Correct 852 ms 12424 KB Output is correct
7 Correct 853 ms 12672 KB Output is correct
8 Correct 898 ms 12416 KB Output is correct
9 Correct 759 ms 12388 KB Output is correct
10 Correct 1 ms 504 KB Output is correct
11 Correct 869 ms 12408 KB Output is correct
12 Correct 848 ms 12392 KB Output is correct
13 Correct 786 ms 12412 KB Output is correct
14 Correct 864 ms 12584 KB Output is correct
15 Correct 844 ms 12404 KB Output is correct
16 Correct 833 ms 12392 KB Output is correct
17 Correct 839 ms 12404 KB Output is correct
18 Correct 847 ms 12380 KB Output is correct
19 Correct 864 ms 12396 KB Output is correct
20 Correct 558 ms 12380 KB Output is correct

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 8 ms 12380 KB Output is correct
20 Correct 8 ms 12380 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 11 ms 12380 KB Output is correct
23 Correct 8 ms 12124 KB Output is correct
24 Correct 9 ms 12200 KB Output is correct
25 Correct 8 ms 12244 KB Output is correct
26 Correct 8 ms 12376 KB Output is correct
27 Correct 10 ms 12380 KB Output is correct
28 Correct 8 ms 12380 KB Output is correct
29 Correct 8 ms 12200 KB Output is correct
30 Runtime error 459 ms 1048576 KB Execution killed with signal 9
31 Halted 0 ms 0 KB -