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Submission #1083787

# Submission time Handle Problem Language Result Execution time Memory
1083787 2024-09-04T07:15:20 Z alexdumitru ICC (CEOI16_icc) C++17
0 / 100
 3 ms 604 KB 
#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[perm[pos2]])
            comp[perm[pos1]].push_back(node);
        for (int i = pos2; i + 1 < nrc; i++)
            comp[i] = comp[i + 1];

        nrc--;
    }
}

Compilation message

icc.cpp: In function 'void run(int)':
icc.cpp:71:26: warning: 'pos2' may be used uninitialized in this function [-Wmaybe-uninitialized]
   71 |         pos2 = cmp[B[pos2]];
      |                    ~~~~~~^
icc.cpp:70:26: warning: 'pos1' may be used uninitialized in this function [-Wmaybe-uninitialized]
   70 |         pos1 = cmp[A[pos1]];
      |                    ~~~~~~^

Subtask #1
0 / 7.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 604 KB Wrong road!
2 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 604 KB Wrong road!
2 Halted 0 ms 0 KB -

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 424 KB Wrong road!
2 Halted 0 ms 0 KB -

Subtask #4
0 / 21.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 604 KB Wrong road!
2 Halted 0 ms 0 KB -

Subtask #5
0 / 29.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 604 KB Wrong road!
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 600 KB Wrong road!
2 Halted 0 ms 0 KB -