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Submission #97261

# Submission time Handle Problem Language Result Execution time Memory
97261 2019-02-14T16:25:35 Z popovicirobert Permutation Recovery (info1cup17_permutation) C++14
43 / 100
 1324 ms 4820 KB 
#include <bits/stdc++.h>
#define lsb(x) (x & (-x))
#define ll long long
#define ull unsigned long long
#define ld long double
// 217
// 44

using namespace std;

const int MOD = (int) 1e9 + 7;
const int MAXN = 70000;

inline void mod(int &x) {
    if(x >= MOD)
        x -= MOD;
}

int dif[MAXN + 1], aux[MAXN + 1];
string str;

const int B = 300;

unordered_multiset <int> fr[MAXN / B];
int lazy[MAXN / B];

int main() {
    //ifstream cin("A.in");
    //ofstream cout("A.out");
    int i, j, n;
    ios::sync_with_stdio(false);
    cin.tie(0), cout.tie(0);
    cin >> n;
    int last = 0;
    for(i = 0; i < n; i++) {
        cin >> str;
        int cur = 0;
        for(auto it : str) {
            cur = (1LL * cur * 10 + it - '0') % MOD;
        }
        dif[i] = cur - last + MOD;
        mod(dif[i]);
        last = cur;
    }
    for(i = 0; i < n; i++) {
        fr[i / B].insert(dif[i]);
        aux[i] = dif[i];
    }
    vector <int> sol(n);
    for(int tt = 1; tt <= n; tt++) {
        i = (n - 1) / B;
        while(i > 0) {
            int cur = 1 + lazy[i];
            mod(cur);
            if(fr[i].find(cur) != fr[i].end()) {
                break;
            }
            i--;
        }
        int pos;
        for(j = min(n - 1, (i + 1) * B - 1); j >= i * B; j--) {
            if(sol[j]) {
                continue;
            }
            int cur = aux[j] - lazy[i] + MOD;
            mod(cur);
            if(cur == 1) {
                pos = j;
                break;
            }
        }
        sol[pos] = tt;
        fr[i].erase(fr[i].find(aux[pos]));
        for(j = pos + 1; j < min(n, (i + 1) * B); j++) {
            if(sol[j]) {
                continue;
            }
            fr[i].erase(fr[i].find(aux[j]));
            aux[j] += MOD - dif[pos];
            mod(aux[j]);
            fr[i].insert(aux[j]);
        }
        i++;
        while(i < (n - 1) / B) {
            lazy[i] += dif[pos];
            mod(lazy[i]);
            i++;
        }
        for(j = i * B; j < n; j++) {
            if(sol[j]) {
                continue;
            }
            fr[i].erase(fr[i].find(aux[j]));
            aux[j] += MOD - dif[pos];
            mod(aux[j]);
            fr[i].insert(aux[j]);
        }
    }
    for(i = 0; i < n; i++) {
        cout << sol[i] << " ";
    }
    //cin.close();
    //cout.close();
    return 0;
}

Compilation message

permutation.cpp: In function 'int main()':
permutation.cpp:60:13: warning: 'pos' may be used uninitialized in this function [-Wmaybe-uninitialized]
         int pos;
             ^~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 9 ms 384 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 9 ms 384 KB Output is correct
3 Correct 22 ms 476 KB Output is correct
4 Correct 19 ms 384 KB Output is correct

Subtask #4
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 9 ms 384 KB Output is correct
3 Correct 22 ms 476 KB Output is correct
4 Correct 19 ms 384 KB Output is correct
5 Runtime error 1324 ms 4820 KB Execution killed with signal 11 (could be triggered by violating memory limits)

Subtask #5
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 9 ms 384 KB Output is correct
3 Correct 22 ms 476 KB Output is correct
4 Correct 19 ms 384 KB Output is correct
5 Runtime error 1324 ms 4820 KB Execution killed with signal 11 (could be triggered by violating memory limits)

Subtask #6
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 9 ms 384 KB Output is correct
3 Correct 22 ms 476 KB Output is correct
4 Correct 19 ms 384 KB Output is correct
5 Runtime error 1324 ms 4820 KB Execution killed with signal 11 (could be triggered by violating memory limits)

Subtask #7
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 9 ms 384 KB Output is correct
3 Correct 22 ms 476 KB Output is correct
4 Correct 19 ms 384 KB Output is correct
5 Runtime error 1324 ms 4820 KB Execution killed with signal 11 (could be triggered by violating memory limits)

Subtask #8
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 9 ms 384 KB Output is correct
3 Correct 22 ms 476 KB Output is correct
4 Correct 19 ms 384 KB Output is correct
5 Runtime error 1324 ms 4820 KB Execution killed with signal 11 (could be triggered by violating memory limits)