제출 #672666

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
672666		haxorman	Teams (CEOI11_tea)	C++14	0 / 100	266 ms	21060 KiB

tea

#include <bits/stdc++.h>
using namespace std;
 
const int mxN = 1e6 + 7;

pair<int,int> arr[mxN];

int32_t main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	
    int n;
    cin >> n;

    for (int i = 0; i < n; ++i) {
        cin >> arr[i].first;
        arr[i].second = i + 1;
    }
    sort(arr, arr + n, greater<pair<int,int>>());
    
    vector<vector<int>> ans;
    for (int i = 0; i < n;) {
        if (arr[i].first > n - i) {
            if (!ans.size()) {
                cout << "0\n";
                exit(0);
            }
            ans.back().push_back(arr[i].second);
            ++i;
        }
        else {
            ans.push_back({arr[i].second});
            int tmp = i + 1;
            while (ans.back().size() < arr[i].first) {
                ans.back().push_back(arr[tmp++].second);
            }
            i = tmp;
        }
    }
    
    cout << ans.size() << "\n";
    for (auto vec : ans) {
        cout << vec.size() << ' ';
        for (auto x : vec) {
            cout << x << ' ';
        }
        cout << "\n";
    }
}

컴파일 시 표준 에러 (stderr) 메시지

tea.cpp: In function 'int32_t main()':
tea.cpp:33:38: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   33 |             while (ans.back().size() < arr[i].first) {
      |                    ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~

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