Submission #1174425

#	Time	Username	Problem	Language	Result	Execution time	Memory
1174425		yeediot	Maxcomp (info1cup18_maxcomp)	C++20	60 / 100	205 ms	48596 KiB

maxcomp

#pragma GCC optimize("Ofast")
#include<bits/stdc++.h>
#define int long long
using namespace std;
#define F first
#define S second
#define all(x) x.begin(),x.end()
#define pii pair<int,int>
#define pb push_back
#define sz(x) (int)(x.size())
#define chmin(x,y) x=min(x,y)
#define chmax(x,y) x=max(x,y)
#define vi vector<int>
#define vp vector<pii>
#define vvi vector<vi>
#define ykh mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count())
#define __lg(x) 63-__builtin_clzll(x)
#define pow2(x) (1LL<<x)
void __print(int x) {cerr << x;}
void __print(float x) {cerr << x;}
void __print(double x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << '\'' << x << '\'';}
void __print(const char *x) {cerr << '\"' << x << '\"';}
void __print(const string &x) {cerr << '\"' << x << '\"';}
void __print(bool x) {cerr << (x ? "true" : "false");}

template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
#ifdef local
void CHECK();
void setio(){
    freopen("/Users/iantsai/cpp/input.txt","r",stdin);
    freopen("/Users/iantsai/cpp/output.txt","w",stdout);
}
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
void setio(){}
#define debug(x...)
#endif
#define TOI_is_so_de ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);setio();
void solve(){
    int n, m;
    cin >> n >> m;
    vector<vector<int>>g(n + 1, vector<int>(m + 1)), dis(n + 1, vector<int>(m + 1));
    priority_queue<array<int, 3>>pq;
    vector<array<int, 3>>vec;
    for(int i = 1; i <= n; i++){
        for(int j = 1; j <= m; j++){
            cin >> g[i][j];
            //pq.push({g[i][j] - 1, i, j});
            vec.pb({g[i][j] - 1, i, j});
            dis[i][j] = g[i][j] - 1;
        }
    }
    sort(all(vec), greater<array<int, 3>>());
    vector<int>dx{1, 0, -1, 0}, dy{0, 1, 0, -1};
    int ans = -1;
    queue<array<int, 3>>q;
    q.push(vec[0]);
    int pos = 1;
    while(sz(q)){
        auto [v, x, y] = q.front();
        q.pop();
        while(pos < n * m and vec[pos][0] == v){
            q.push(vec[pos]);
            pos++;
        }
        chmax(ans, v - g[x][y]);
        if(v != dis[x][y]) continue;
        for(int r = 0; r < 4; r++){
            int nx = x + dx[r], ny = y + dy[r];
            if(nx < 1 or nx > n or ny < 1 or ny > m) continue;
            if(dis[nx][ny] < dis[x][y] - 1){
                dis[nx][ny] = dis[x][y] - 1;
                q.push({dis[nx][ny], nx, ny});
            }
        }
    }
    cout << ans << '\n';
}
signed main(){
    TOI_is_so_de;
    int t = 1;
    //cin >> t;
    while(t--){
        solve();
    }
    #ifdef local
    CHECK();
    #endif
}
/*
input:
 
*/
#ifdef local
void CHECK(){
    cerr << "\n[Time]: " << 1000.0 * clock() / CLOCKS_PER_SEC << " ms.\n";
    function<bool(string,string)> compareFiles = [](string p1, string p2)->bool {
        std::ifstream file1(p1);
        std::ifstream file2(p2);
        if(!file1.is_open() || !file2.is_open()) return false;
        std::string line1, line2;
        while (getline(file1, line1) && getline(file2, line2)) {
            if (line1 != line2)return false;
        }
        int cnta = 0, cntb = 0;
        while(getline(file1,line1))cnta++;
        while(getline(file2,line2))cntb++;
        return cntb - cnta <= 1;
    };
    bool check = compareFiles("output.txt","expected.txt");
    if(check) cerr<<"ACCEPTED\n";
    else cerr<<"WRONG ANSWER!\n";
}
#else
#endif

• Subtask 1: 15 / 15
• Subtask 2: 15 / 15
• Subtask 3: 30 / 30
• Subtask 4: 0 / 40