제출 #1083788

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1083788		alexdumitru	ICC (CEOI16_icc)	C++17	0 / 100	3 ms	604 KiB

icc

#include <bits/stdc++.h>
#include "icc.h"

using namespace std;

const int NMAX = 100;

mt19937 mt(time(0));

int A[NMAX], B[NMAX];
int cnt1, cnt2;
int cmp[NMAX + 1];
vector<vector<int>> comp;

void run(int n) {
    comp.resize(n);
    for (int i = 0; i < n; i++)
        comp[i].push_back(i + 1);
    int nrc = n;
    for (int step = 1; step < n; step++) {
        vector<int> perm(nrc);
        iota(perm.begin(), perm.end(), 0);

        bool diffHalfs = false;
        while (!diffHalfs) {
            shuffle(perm.begin(), perm.end(), mt);
            cnt1 = cnt2 = 0;
            for (int i = 0; i < nrc / 2; i++) {
                for (int node : comp[perm[i]]) {
                    cmp[node] = perm[i];
                    A[cnt1++] = node;
                }
            }
            for (int i = nrc / 2; i < nrc; i++) {
                for (int node : comp[perm[i]]) {
                    cmp[node] = perm[i];
                    B[cnt2++] = node;
                }
            }
            diffHalfs = query(cnt1, cnt2, A, B);
        }

        int pos1, pos2;

        int st = 0;
        int dr = cnt1 - 1;
        while (st <= dr) {
            int mij = (st + dr) / 2;
            if (query(mij + 1, cnt2, A, B)) {
                pos1 = mij;
                dr = mij - 1;
            } else {
                st = mij + 1;
            }
        }

        st = 0;
        dr = cnt2 - 1;
        while (st <= dr) {
            int mij = (st + dr) / 2;
            if (query(cnt1, mij + 1, A, B)) {
                pos2 = mij;
                dr = mij - 1;
            } else {
                st = mij + 1;
            }
        }

        setRoad(pos1, pos2);

        pos1 = cmp[A[pos1]];
        pos2 = cmp[B[pos2]];
        if (pos1 > pos2) swap(pos1, pos2);

        for (int node : comp[pos2])
            comp[pos1].push_back(node);
        for (int i = pos2; i + 1 < nrc; i++)
            comp[i] = comp[i + 1];

        nrc--;
    }
}

컴파일 시 표준 에러 (stderr) 메시지

icc.cpp: In function 'void run(int)':
icc.cpp:72:26: warning: 'pos2' may be used uninitialized in this function [-Wmaybe-uninitialized]
   72 |         pos2 = cmp[B[pos2]];
      |                    ~~~~~~^
icc.cpp:71:26: warning: 'pos1' may be used uninitialized in this function [-Wmaybe-uninitialized]
   71 |         pos1 = cmp[A[pos1]];
      |                    ~~~~~~^

• Subtask 1: 0 / 7
• Subtask 2: 0 / 11
• Subtask 3: 0 / 22
• Subtask 4: 0 / 21
• Subtask 5: 0 / 29
• Subtask 6: 0 / 10