Submission #374112

#	Time	Username	Problem	Language	Result	Execution time	Memory
374112		gustason	ASM (LMIO18_asm)	C++11	9 / 100	1 ms	384 KiB

asm

#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define int ll
ll INF = 1LL << 62;
int n;
vector<pair<ll, ll>> a;
ll subll(ll x, int l, int r) {
    string s = to_string(x);
    s = s.substr(l, (r-l)+1);
    return stoll(s);
}
bool check(vector<pair<char, int>> ans) {
    vector<int> last(n+1, -1);

    for(int i = 0; i < n; i++) {
        ll x = a[i].first;
        string s = to_string(a[i].second);
        s += "xyz";

        for(auto j : ans) {
            if (j.first == 'm') {
                x *= j.second;
            } else if (j.first == 'a') {
                x += j.second;
            } else {
                string st = to_string(x);
//                cout << x << " " << last[i] << "\n";
                int lg = ceil(log10(x));
                if (lg + last[i] > n+2) return false;
                for(int k = 1; k <= lg; k++) {
//                    cout << s[last[i]+k] << " " << st[k-1] << "\n";
                    if (s[last[i]+k] != st[k-1]) return false;
                }
                last[i] += lg;
            }
            if (x > a[i].second) return false;
        }
//        cout << last[i] << "\n";
        if (last[i] != s.size()-4) return false;
    }
//    cerr << "\n";
    return true;
}
pair<ll, ll> checkpair(pair<ll, ll> x, pair<ll, ll> y) {
    ll diff1 = y.first - x.first;
    ll diff2 = y.second - x.second;
    if (diff1 < 0) return {-1, -1};
    if (diff2 < 0) return {-1, -1};

    if (diff2 == 0) diff2++;
    ll mult = (diff2) / (diff1);
    if (mult == 0) {
        if (x.second != y.second)
            return {-1, -1};
        else
            return {0, x.second};
    }
    if (INF / mult < x.first) return {-1, -1};

    ll add = x.second - (x.first * mult);
    return {mult, add};
}
void printAns(vector<pair<char, ll>> ans) {
    cout << ans.size() << "\n";
    for(auto i : ans) {
        if (i.first == 'm') {
            cout << "multiply " << i.second;
        } else if (i.first == 'a') {
            cout << "add " << i.second;
        } else {
            cout << "print";
        }
        cout << "\n";
    }
    exit(0);
}
void solveOne(ll x, ll y) {
    vector<pair<char, int>> ans;
    if (x > y) {
        ans.push_back({'m', 0});
        x = 0;
    }
    if (y - x != 0)
        ans.push_back({'a', y - x});
    ans.push_back({'p', -1});
    printAns(ans);
}
vector<vector<int>> split(int na) {
    vector<vector<int>> splita;
    for(int mask = 0; mask < (1 << na); mask++) {
        int last = 0, lastl = 0;
        vector<int> idx;
        for(int i = 0; i < na; i++) {
            if (mask & (1 << i)) {
                if (i - last < lastl)
                    goto Done;
                idx.push_back(i);
                lastl = i - last;
                last = i;
            }
        }
        if (idx.empty() || idx.back() != na-1)
            idx.push_back(na-1);
        splita.push_back(idx);
        Done:;
    }
    return splita;
}
void solve() {
    if (n == 1)
        solveOne(a[0].first, a[0].second);

    sort(a.begin(), a.end(), [](pair<ll, ll>& left, pair<ll, ll>& right){return left.second < right.second;});
    int na = ceil(log10(a[0].second));
    int nb = ceil(log10(a[1].second));
    int best = 999;
    vector<pair<char, int>> ans;
    vector<vector<int>> splita = split(na),
                        splitb = split(nb);

    for(auto i : splita) {
        for(auto j : splitb) {
            if (i.size() != j.size()) continue;

            ll curra = a[0].first, currb = a[1].first;
            pair<int, int> last = {-1, -1};
            vector<pair<char, int>> ins;
            for(int k = 0; k < i.size(); k++) {
                ll x = subll(a[0].second, last.first+1, i[k]);
                ll y = subll(a[1].second, last.second+1, j[k]);

                last = {i[k], j[k]};
//                cout << x << " " << y << "\n";
                pair<ll, ll> got = checkpair({curra, x}, {currb, y});
                if (got.first == -1) continue;
                if (got.first == 0 && k != 0) break;
                if (got.first != 1) ins.push_back({'m', got.first});
                if (got.second != 0)
                    ins.push_back({'a', got.second});
                ins.push_back({'p', -1});

                curra *= got.first;
                curra += got.second;
                currb *= got.first;
                currb += got.second;
//                cout << curra << " " << currb << "\n";
            }
//            cerr << "\n";
            if (ins.size() < best && check(ins)) {
                best = ins.size();
                ans = ins;
            }
        }
   }

   if (best != 999) {
        printAns(ans);
   } else {
        cout << -1;
   }
//    for(auto i : splitb) {
//        cout << i.size() << "\n";
//    }
//    cout << splita.size() << " " << splitb.size() << "\n";
}
signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cin >> n;
    a.resize(n);
    for(int i = 0; i < n; i++) {
        cin >> a[i].first >> a[i].second;
    }
    solve();
    return 0;
}

Compilation message (stderr)

asm.cpp: In function 'bool check(std::vector<std::pair<char, long long int> >)':
asm.cpp:40:21: warning: comparison of integer expressions of different signedness: '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type' {aka 'long long int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |         if (last[i] != s.size()-4) return false;
asm.cpp: In function 'void solve()':
asm.cpp:129:30: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  129 |             for(int k = 0; k < i.size(); k++) {
      |                            ~~^~~~~~~~~~
asm.cpp:150:28: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<char, long long int> >::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
  150 |             if (ins.size() < best && check(ins)) {
      |                 ~~~~~~~~~~~^~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 0 / 17
• Subtask 3: 0 / 53
• Subtask 4: 0 / 21