Submission #630398

#	Time	Username	Problem	Language	Result	Execution time	Memory
630398		Ronin13	메기 농장 (IOI22_fish)	C++17	6 / 100	1027 ms	202640 KiB

fish

#include "fish.h"
#include <bits/stdc++.h>
#define ll long long
#define f frist
#define s second
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pb push_back
#define epb emplace_back
#define ull unsigned ll;
#include <vector>

using namespace std;

const int NMAX = 1e6 + 1;

map<pii, ll> val;
vector <vector <ll> > dp(NMAX);
vector <vector <ll> > DP(NMAX);
map<pii, int> ind;

long long max_weights(int N, int M, std::vector<int> X, std::vector<int> Y,std::vector<int> W) {
    int n = N, m = M;
    vector <vector <int> > vec(n + 2);
    for(int i = 0; i < M; i++){
        vec[X[i] + 1].pb(Y[i] + 1);
        val[{X[i] + 1,Y[i] + 1}] = W[i];
    }
    for(int i = 0; i <= n + 1; i++){
        if(val[{i, 0}] == 0) vec[i].pb(0);
        if(val[{i, n}] == 0) vec[i].pb(n);
        //sort(vec[i].begin(), vec[i].end());
    }
    for(int i = 0; i < M; i++){
        if(Y[i] < n - 2){
            ll v = val[{X[i], Y[i] + 2}];
            if(v == 0) vec[X[i]].pb(Y[i] + 2);
        }
        if(Y[i] > 0){
            ll v = val[{X[i], Y[i]}];
            if(v == 0) vec[X[i]].pb(Y[i]);
        }
    }
    for(int i = 0; i <= n + 1; i++){
        sort(vec[i].begin(), vec[i].end());
        dp[i].resize(vec[i].size());
        DP[i].resize(vec[i].size());
    }
    for(int i= 0; i <= n + 1; i++){
        for(int j = 0; j < vec[i].size(); j++){
            int x = vec[i][j];
            ind[{i, x}] = j;
        }
    }
    for(int i = 1; i <= n + 1; i++){
        if(i > 1){
            ll last = -1;
            for(int j = vec[i].size() - 1; j >= 0; j--){
                ll vv = val[{i, vec[i][j]}];
                int ind1 = ind[{i - 1, vec[i][j] + 1}];
                if(last == -1){
                    dp[i][j] = max(dp[i - 2][0], DP[i - 2].back()) + vv;
                }
                else{
                    dp[i][j] = max(dp[i - 1][ind1], dp[i][j + 1]) + vv;
                }
                last = dp[i][j];
            }
        }
        for(int j = 0; j < vec[i].size(); j++){
            ll vv = val[{i, vec[i][j]}];
            int ind1 = ind[{i - 1, vec[i][j] - 1}];
            if(j == 0){
                DP[i][j] = dp[i - 1][0] + vv;
            }
            else{
                DP[i][j] = max(DP[i][j - 1] , DP[i - 1][ind1]) + vv;
            }
        }
    }
    ll ans = 0;
    for(int i= 0; i <= n + 1; i++) ans = max(dp[i][0], ans);
  return ans;
}

Compilation message (stderr)

fish.cpp: In function 'long long int max_weights(int, int, std::vector<int>, std::vector<int>, std::vector<int>)':
fish.cpp:50:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   50 |         for(int j = 0; j < vec[i].size(); j++){
      |                        ~~^~~~~~~~~~~~~~~
fish.cpp:70:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   70 |         for(int j = 0; j < vec[i].size(); j++){
      |                        ~~^~~~~~~~~~~~~~~
fish.cpp:23:16: warning: unused variable 'm' [-Wunused-variable]
   23 |     int n = N, m = M;
      |                ^

• Subtask 1: 0 / 3
• Subtask 2: 6 / 6
• Subtask 3: 0 / 9
• Subtask 4: 0 / 14
• Subtask 5: 0 / 21
• Subtask 6: 0 / 17
• Subtask 7: 0 / 14
• Subtask 8: 0 / 16