Submission #94809

#	Time	Username	Problem	Language	Result	Execution time	Memory
94809		someone_aa	Teams (IOI15_teams)	C++17	34 / 100	4027 ms	20836 KiB

teams

#include <bits/stdc++.h>
#include "teams.h"
#define P pair<int,int>
#define pb push_back
#define ll long long
#define mp make_pair
using namespace std;
int n;
vector<P>intervals;

bool compare(P a, P b) {
    if(a.second == b.second) return a.first > b.first;
    else return a.second < b.second;
}

void init(int N, int A[], int B[]) {
    n = N;
    for(int i=0;i<N;i++) {
        intervals.pb(mp(A[i], B[i]));
    }
    sort(intervals.begin(), intervals.end(), compare);
}

int OK[500100];
bool visited[500100];
int ln[500100], rn[500100];

int can(int M, int K[]) {
    sort(K, K + M);
    ll sum = 0LL;
    for(int i=0;i<M;i++) {
        OK[i] = K[i];
        sum += 1LL * K[i];
    }
    if(sum > n) return 0;

    for(int i=0;i<n;i++) {
        visited[i] = false;
    }

    for(int i=0;i<n;i++) {
        ln[i] = i-1;
        rn[i] = i+1;
    }
    rn[n-1] = -1;

    int taken = 0;
    int st = 0;
    int br = 0;
    for(int p=0;p<M;p++) {
        int j = st;
        int taken = 0;
        while(j != -1) {
            if(intervals[j].first <= K[p] && intervals[j].second >= K[p]) {
                taken++;
                rn[ln[j]] = rn[j];
                ln[rn[j]] = ln[j];
                if(j == st) {
                    j = rn[j];
                    st = j;
                }
                else j = rn[j];

                if(taken == K[p]) {
                    br++;
                    break;
                }
            }
            else j = rn[j];
        }
        if(taken != K[p]) break;
    }
    return bool(br == M);
}

Compilation message (stderr)

teams.cpp: In function 'int can(int, int*)':
teams.cpp:52:13: warning: declaration of 'taken' shadows a previous local [-Wshadow]
         int taken = 0;
             ^~~~~
teams.cpp:47:9: note: shadowed declaration is here
     int taken = 0;
         ^~~~~
teams.cpp:47:9: warning: unused variable 'taken' [-Wunused-variable]

• Subtask 1: 21 / 21
• Subtask 2: 13 / 13
• Subtask 3: 0 / 43
• Subtask 4: 0 / 23