Submission #339884

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
339884	2020-12-26T10:29:33 Z	Vladth11	Mountains (IOI17_mountains)	C++14	Compilation error	0 ms	0 KB

mountains

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define debug(x) cerr << #x << " " << x << "\n"
#define debug_with_space(x) cerr << #x << " " << x << " "
#include "mountains.h"

using namespace std;
using namespace __gnu_pbds;
typedef long long ll;
typedef pair <ll, ll> pii;
typedef pair <ll, pii> piii;
typedef tree <pii, null_type, less <pii>, rb_tree_tag, tree_order_statistics_node_update> OST;

const ll NMAX = 2001;
const ll INF = (1LL << 60);
const ll MOD = 1000000007;
const ll BLOCK = 101;
const ll nr_of_bits = 35;

ll dp[NMAX][NMAX];

class ConvexHull{
    pii stiva[NMAX];
    ll vf;
    bool OK(pii a, pii b, pii c){
        return ((a.first * (b.second - c.second) + b.first * (c.second - a.second) + c.first * (a.second - b.second)) <= 0);
    }
public:
    ll size(){
        return vf;
    }
    ll last(){
        return stiva[vf].first;
    }
    ll lastbutone(){
        return stiva[vf - 1].first;
    }
    void push(pii x){
        while(vf > 1 && OK(stiva[vf], stiva[vf - 1], x)){
            vf--;
        }
        stiva[++vf] = x;
    }
}hull;

int maximum_deevs(vector<int> y) {
    ll i, j, maxim = 0;
    ll n = y.size();
    for(i = n; i >= 1; i--) {
        for(j = i; j <= n; j++) {
            hull.push({j, y[j - 1]});
            ll ultim = hull.last();
            dp[i][j] = 1;
            dp[i][j] = max(dp[i][j], dp[i][ultim - 1]);
            if(hull.size() > 1) {
                ll penultim = hull.lastbutone();
                dp[i][j] = max(dp[i][j], dp[i][penultim - 1] + dp[penultim + 1][j]);
            }
            maxim = max(maxim, dp[i][j]);
        }
    }
    return maxim;
}

int main() {
    ll n;
    assert(1 == scanf("%d", &n));
    std::vector<int> y(n);
    for (ll i = 0; i < n; i++) {
        assert(1 == scanf("%d", &y[i]));
    }
    ll result = maximum_deevs(y);
    printf("%d\n", result);
    return 0;
}

Compilation message

In file included from /usr/include/c++/9/ext/pb_ds/detail/pat_trie_/pat_trie_.hpp:45,
                 from /usr/include/c++/9/ext/pb_ds/detail/container_base_dispatch.hpp:90,
                 from /usr/include/c++/9/ext/pb_ds/assoc_container.hpp:48,
                 from mountains.cpp:2:
mountains.cpp: In function 'int main()':
mountains.cpp:68:23: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'll*' {aka 'long long int*'} [-Wformat=]
   68 |     assert(1 == scanf("%d", &n));
      |                       ^~~~  ~~
      |                             |
      |                             ll* {aka long long int*}
mountains.cpp:68:25: note: format string is defined here
   68 |     assert(1 == scanf("%d", &n));
      |                        ~^
      |                         |
      |                         int*
      |                        %lld
mountains.cpp:74:14: warning: format '%d' expects argument of type 'int', but argument 2 has type 'll' {aka 'long long int'} [-Wformat=]
   74 |     printf("%d\n", result);
      |             ~^     ~~~~~~
      |              |     |
      |              int   ll {aka long long int}
      |             %lld
/tmp/ccHDGVpi.o: In function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'
/tmp/ccz3uyYg.o:mountains.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status