Submission #1164160

#	Time	Username	Problem	Language	Result	Execution time	Memory
1164160		SmuggingSpun	Catfish Farm (IOI22_fish)	C++20	9 / 100	48 ms	7240 KiB

fish

#include<bits/stdc++.h>
#include "fish.h"
using namespace std;
typedef long long ll;
template<class T>void maximize(T& a, T b){
    if(a < b){
        a = b;
    }
}
ll max_weights(int n, int m, vector<int>X, vector<int>Y, vector<int>W){
    bool is_sub1 = true;
    for(int& x : X){
        if(x & 1){
            is_sub1 = false;
            break;
        }
    }
    if(is_sub1){
        return accumulate(W.begin(), W.end(), 0LL);
    }
    if(*max_element(X.begin(), X.end()) <= 1){
        if(n > 2){
            ll sum = 0;
            vector<vector<pair<int, int>>>p(2);
            for(int i = 0; i < m; i++){
                if(X[i] == 1){
                    sum += W[i];
                    p[1].emplace_back(Y[i], W[i]);
                }
                else{
                    p[0].emplace_back(Y[i], W[i]);
                }
            }
            p[1].emplace_back(-1, 0);
            sort(p[0].begin(), p[0].end());
            sort(p[1].begin(), p[1].end());
            p[1].emplace_back(n, 0);
            ll ans = sum;
            for(int i = 0, j = 0; j + 1 < p[1].size(); j++){
                sum -= p[1][j].second;
                if(p[1][j].first == p[1][j + 1].first){
                    continue;
                }
                while(i < p[0].size() && p[0][i].first < p[1][j + 1].first){
                    sum += p[0][i].second;
                    i++;
                }
                maximize(ans, sum);
            }
            return ans;
        }
        ll sum_0 = 0, sum_1 = 0;
        for(int i = 0; i < m; i++){
            if(X[i] == 0){
                sum_0 += W[i];
            }
            else{
                sum_1 += W[i];
            }
        }
        return max(sum_0, sum_1);
    }
}

Compilation message (stderr)

fish.cpp: In function 'll max_weights(int, int, std::vector<int>, std::vector<int>, std::vector<int>)':
fish.cpp:63:1: warning: control reaches end of non-void function [-Wreturn-type]
   63 | }
      | ^

• Subtask 1: 3 / 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