Submission #783993

#	Time	Username	Problem	Language	Result	Execution time	Memory
783993		SoulKnight	Catfish Farm (IOI22_fish)	C++17	0 / 100	104 ms	15576 KiB

fish

#include "fish.h"

#include <bits/stdc++.h>

using namespace std;

#define ll long long
#define ln '\n'


long long max_weights(int N, int M, std::vector<int> X, std::vector<int> Y,
                      std::vector<int> W) {

    if (N <= 2){
        ll r0, r1; r0 = r1 = 0LL;

        for (int i = 0; i < M; i++){
            if (X[i] == 1) r1 += W[i];
            else r0 += W[i];
        }

        return max(r0, r1);
    } else {
        ll r0, r1; r0 = r1 = 0LL;

        vector<array<ll, 2>> vec0, vec1;

        for (int i = 0; i < M; i++){
            if (X[i] == 0) {vec0.push_back({Y[i], W[i]}); r0 += W[i];}
            else {vec1.push_back({Y[i], W[i]}); r1 += W[i];}
        }

        if (vec0.empty()) {return r1;}
        if (vec1.empty()) {return r0;}

        sort(vec0.begin(), vec0.end());
        sort(vec1.begin(), vec1.end());

        for (int i = 1; i < vec0.size(); i++) vec0[i][1] += vec0[i-1][1];
        for (int i = 1; i < vec1.size(); i++) vec1[i][1] += vec1[i-1][1];


        ll ans1 = r1;
        array<ll, 2> t;

        for (auto& p: vec0){
            // cout << p[0] << ' ' << p[1] << ln;
            t = {p[0], -1};
            int idx = upper_bound(vec1.begin(), vec1.end(), t) - vec1.begin();
            idx--;
            ll tmp = r1;
            if (idx >= 0) tmp -= vec1[idx][1];

            ans1 = max(ans1, tmp + p[1]);
        }

        ll ans0 = r0;

        for (auto& p: vec1){
            // cout << p[0] << ' ' << p[1] << ln;
            t = {p[0], -1};
            int idx = upper_bound(vec0.begin(), vec0.end(), t) - vec0.begin();
            idx--;
            ll tmp = r0;
            if (idx >= 0) tmp -= vec0[idx][1];

            ans0 = max(ans0, tmp + p[1]);
        }

        return max(ans0, ans1);
    }

}

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:39:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::array<long long int, 2> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |         for (int i = 1; i < vec0.size(); i++) vec0[i][1] += vec0[i-1][1];
      |                         ~~^~~~~~~~~~~~~
fish.cpp:40:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::array<long long int, 2> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |         for (int i = 1; i < vec1.size(); i++) vec1[i][1] += vec1[i-1][1];
      |                         ~~^~~~~~~~~~~~~

• Subtask 1: 0 / 3
• Subtask 2: 0 / 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