Submission #1060202

#	Time	Username	Problem	Language	Result	Execution time	Memory
1060202		anango	Marathon Race 2 (JOI24_ho_t3)	C++17	62 / 100	1557 ms	2544 KiB

Main

#include <bits/stdc++.h>
//#define int long long
using namespace std;

#pragma GCC optimize("Ofast,unroll-loops,fast-math")

int INF = 1LL<<30;

int maxbloat = 1008;


signed main() {
    int local = 0;
    if (local) {
        // for getting input from input.txt
        freopen("input.txt", "r", stdin);
        // for writing output to output.txt
        freopen("output.txt", "w", stdout);
    }
    #ifdef ONLINE_JUDGE
    	ios_base::sync_with_stdio(false);
    	cin.tie(NULL);
    #endif //fast IO
    int n,l; cin >> n >> l;
    vector<int> balls; 
    for (int i=0; i<n; i++) {
        int x; cin >> x; balls.push_back(x);
    }
    vector<int> coords; 
    map<int,int> revcoords;
    for (int i=0; i<n; i++) {
        coords.push_back(balls[i]);
    }
    sort(coords.begin(), coords.end());
    coords.erase(unique(coords.begin(), coords.end()), coords.end());

    
    int q; cin >> q;
    if (coords.size()>maxbloat) {
        while (q--) {
            int s,g,t; cin >> s >> g >> t; cout << "No" << endl;
        }
        return 0;
    }

    for (int i=0; i<coords.size(); i++) {
        revcoords[coords[i]] = i;
    }
    //dp[l][r-l][x-l] = min cost of picking up balls l through r, if we start at pos of ball x (l<=x<=r)
    n = coords.size(); 
    vector<int> counts(n,0);
    vector<int> pref(n+1,0);
    for (int i=0; i<balls.size(); i++) {
        counts[revcoords[balls[i]]]++;
    }
    for (int i=0; i<n; i++) {
        pref[i+1] = pref[i] + counts[i];
    }
    int totballs = balls.size();
    vector<int> start_ans0(n);
    vector<int> start_ans1(n);
    for (int x=0; x<n; x++) {
        vector<vector<int>> dp0(n); //finish at left
        vector<vector<int>> dp1(n); //finish at right
        for (int l=0; l<=x; l++) {
            dp0[l]=dp1[l]=vector<int>(n-x,INF); //dp[l][x] to dp[l][n-1]
        }
        dp0[x][0] = dp1[x][0] = 0;
        for (int rml=1; rml<n; rml++) {
            for (int l=max((int)0,x-rml); l<=min(n-rml-1,x); l++) {
                int r = l+rml;
                //cout << l <<" " << r <<" " << x << " " << r-l <<" " << r-1-l << " " << coords.size() << endl;
                //length is r-l+1
                int cta = counts[l];
                int ctb = pref[r]-pref[l+1];
                int ctc = counts[r];
                int rem1 = totballs-ctb-ctc+1;
                int rem2 = totballs-ctb-cta+1;
                //cout << cta <<" " << ctb <<" " << ctc <<" " << rem1 <<" " << rem2 << endl;
                if (l!=x) {
                    //cout << l+1 <<" " << r-x <<" " << "d " << dp0[l+1][r-x] << endl;
                    dp0[l][r-x] = min(dp0[l+1][r-x]+(rem1)*(coords[l+1]-coords[l]),dp1[l+1][r-x]+(rem1)*(coords[r]-coords[l]));
                }
                if (r!=x) {
                    dp1[l][r-x] = min(dp1[l][r-1-x]+(rem2)*(coords[r]-coords[r-1]),dp0[l][r-1-x]+(rem2)*(coords[r]-coords[l]));
                }
            }
        }
        start_ans0[x] = dp0[0][n-1-x];
        start_ans1[x] = dp1[0][n-1-x];
        //cout << "calced " << x <<" " << start_ans0[x] <<" " << start_ans1[x] << endl;
    }

    //subtract n from time limit
    while (q--) {
        int s,g,t; cin >> s >> g >> t;
        t-=totballs;
        int succ = upper_bound(coords.begin(), coords.end(), g)-coords.begin();
        int pred = succ-1;
        //cout << "doing query " << s <<" " << g << " " << t << " " << pred <<" " << succ << endl;
        int ans = INF;
        if (pred>=0) {
            ans=min(ans,min(start_ans0[pred]+(g-coords[pred])*(1+totballs)+abs(s-coords[0]),start_ans1[pred]+(g-coords[pred])*(1+totballs)+abs(s-coords[n-1])));
        }
        if (succ<=n-1) {
            ans=min(ans,min(start_ans0[succ]+(coords[succ]-g)*(1+totballs)+abs(s-coords[0]),start_ans1[succ]+(coords[succ]-g)*(1+totballs)+abs(s-coords[n-1])));
        }
        if (ans<=t) {
            cout << "Yes" << endl;
        }
        else {
            cout << "No" << endl;
        }
        //cout << ans << endl;
    }

    
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:39:22: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   39 |     if (coords.size()>maxbloat) {
      |         ~~~~~~~~~~~~~^~~~~~~~~
Main.cpp:46:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |     for (int i=0; i<coords.size(); i++) {
      |                   ~^~~~~~~~~~~~~~
Main.cpp:53:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |     for (int i=0; i<balls.size(); i++) {
      |                   ~^~~~~~~~~~~~~
Main.cpp:16:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |         freopen("input.txt", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:18:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |         freopen("output.txt", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 7 / 7
• Subtask 3: 10 / 10
• Subtask 4: 28 / 28
• Subtask 5: 10 / 10
• Subtask 6: 0 / 19
• Subtask 7: 0 / 19