oj.uz

Submission #901943

# Submission time Handle Problem Language Result Execution time Memory
901943 2024-01-10T04:39:07 Z nightfal Toy Train (IOI17_train) C++14
0 / 100
 54 ms 100488 KB 
#include <iostream>
#include <vector>
#include <queue>
#include <cstdio>
#include <cassert>
#include <algorithm>


using namespace std;

void printAdjMatrix(vector<vector<int>>& adjM) {
    int n = adjM.size();
    for(int i=0; i<n; i++) {
        printf("%d:",i);
        for(int elem: adjM[i])
            printf(" %d",elem);
        printf("\n");
    }
}
void printAdjList(vector<vector<int>>& adjL) {
    int n = adjL.size();
    for(int i=0; i<n; i++) {
        printf("%d:",i);
        for(int elem: adjL[i])
            printf(" %d", elem);
        printf("\n");
    }
}
void printDegree(vector<int>& Deg) {
    int n = Deg.size();
    for(int i=0; i<n; i++) printf("Deg[%d]=%d ",i,Deg[i]);
    printf("\n");
}

bool isSubtask1(vector<int>& u, vector<int>& v) {
    int m = u.size();
    for(int i=0; i<m; i++)
        if (v[i]!=u[i] && v[i]!=u[i]+1) return false;
    return true;
}
bool isSubtask2(const int n) { return n <= 15;}
bool isSubtask3(const vector<int>& a) {
    for(int i=0; i<a.size(); i++)
        if(a[i]==0) return false;
    return true;
}

bool dfs(int now, int dest, vector<int>& a, vector<int>& r, vector<vector<int>>& adjL, vector<int>& dis, vector<int>& ans) {
    // printf("now:%d, dest:%d, dis[%d]=%d, r[%d]=%d, ans[%d]=%d\n",now,dest,now,(int) dis[now],now,r[now],now,ans[now]);
    if (now==dest) return true;
    if (dis[now]) return false;
    else dis[now] = 1;
    if (a[now]) {
        for(int i=0; i<adjL[now].size(); i++)
            if(dfs(adjL[now][i],dest,a,r,adjL,dis,ans)) {ans[now]=1; break;}
    }
    else {
        int i;
        for(i=0; i<adjL[now].size(); i++)
            if(!dfs(adjL[now][i],dest,a,r,adjL,dis,ans)) break;
        if (i==adjL[now].size()) ans[now] = 1;
    }
    if (ans[now]) printf("win %d \n",now);
    return ans[now];
}

void checkNeighbor(int now, vector<int>& a, vector<vector<int>>& adjL, vector<int>& ans) {
    if (a[now]) {
        for(int i=0; i<adjL[now].size(); i++)
            if(ans[adjL[now][i]]) ans[now]=1;
    }
    else {
        int i;
        for(i=0; i<adjL[now].size(); i++)
            if(!ans[adjL[now][i]]) break;
        if (i==adjL[now].size()) ans[now] = 1;
    }
}

bool dfs3(const int now, const int dest, const vector<vector<int>>& adjL, vector<int>& dis, vector<int>& ans) {
    // printf("now:%d dest:%d\n",now,dest);
    if (dis[now]) return false;
    dis[now] = 1;
    if (now==dest) return true;
    for(int i=0; i<adjL[now].size(); i++) 
        if(dfs3(adjL[now][i],dest,adjL,dis,ans)) {ans[i]=1; return true;}
    return false;
}

vector<int> subtask3(vector<int>& a, vector<int>& r, vector<int>& u, vector<int>& v) {
    int n=a.size(), m=u.size();
    vector<vector<int>> adjL(n+1), adjLRev(n), adjM(n,vector<int>(n));
    vector<int> inDeg(n), outDeg(n);

    for(int i=0; i<m; i++) {
        adjL[u[i]].push_back(v[i]); adjLRev[v[i]].push_back(u[i]);
        adjM[u[i]][v[i]] = 1;
        inDeg[v[i]]++; outDeg[u[i]]++;
    }
    for(auto& list: adjL) sort(list.begin(),list.end());
    for(auto& list: adjLRev) sort(list.begin(),list.end());

    // printf("Adjacency List\n"); printAdjList(adjL);
    // printf("Adjacency List Reverse\n"); printAdjList(adjLRev);

    vector<int> ans(n), dis(n);
    queue<int> q;

    for(int i=0; i<n; i++) {
        dis.assign(n,0);
        if(r[i]) {
            adjL[n] = adjL[i];
            // printf("Adjacency List\n"); printAdjList(adjL);
            ans[i] = (int) dfs3(n,i,adjL,dis,ans);
        }
    }
    // return ans;
    // for(int i=0; i<n; i++) printf("ans[%d]=%d ",i,ans[i]); printf("\n");
    for(int i=0; i<n; i++) if(ans[i]) {q.push(i);} // cout << "push: " << i << endl;}
    for(int i=0; !q.empty(); i++) {
        int node = q.front(); q.pop(); 
        for(int elem: adjLRev[node])
            if (ans[elem]==0) {ans[elem] = 1; q.push(elem);} // cout << "push: " << elem << endl;}
    }
    return ans;
}

vector<int> subtask2(vector<int>& a, vector<int>& r, vector<int>& u, vector<int>& v) {
    int n=a.size(), m=u.size();
    // queue<int> q;
    vector<vector<int>> adjL(n), adjLRev(n), adjM(n,vector<int>(n));
    vector<int> inDeg(n), outDeg(n);

    for(int i=0; i<m; i++) {
        adjL[u[i]].push_back(v[i]); adjLRev[v[i]].push_back(u[i]);
        adjM[u[i]][v[i]] = 1;
        inDeg[v[i]]++; outDeg[u[i]]++;
    }
    for(auto& list: adjL) sort(list.begin(),list.end());
    for(auto& list: adjLRev) sort(list.begin(),list.end());

    // printf("Adjacency Matrix\n"); printAdjMatrix(adjM);
    // printf("Adjacency List\n"); printAdjList(adjL);
    // printf("Adjacency List Reverse\n"); printAdjList(adjLRev);

    // printf("outDegree\n"); printDegree(outDeg);
    // printf("inDegree\n"); printDegree(inDeg);

    vector<int> ans(n);

    for(int i=0; i<n; i++) 
        if(r[i] && !ans[i]) {
            vector<int> dis(n); int j;
            dis[i] = 1;
            if(a[i]) {
                for(j=0; j<adjL[i].size(); j++) 
                    if(dfs(adjL[i][j],i,a,r,adjL,dis,ans)) break;
                if (j<adjL[i].size()) {ans[i] = 1;} // printf("ans[%d]=%d\n",i,ans[i]);}
            }
            else {
                for(j=0; j<adjL[i].size(); j++) 
                    if(!dfs(adjL[i][j],i,a,r,adjL,dis,ans)) break;
                if (j==adjL[i].size()) {ans[i] = 1;} //  printf("ans[%d]=%d\n",i,ans[i]);}
            }
            // if (ans[i]) printf("win %d \n",i);
        }

    for(int i=0; i<n; i++)
        for(int j=0; j<n; j++)
            if (ans[j]==0) checkNeighbor(j,a,adjL,ans);
       
    return ans;
}

vector<int> subtask1(vector<int>& a, vector<int>& r, vector<int>& u, vector<int>& v) {
    int n = a.size(), m = u.size();
    vector<int> ans(n,0);
    vector<vector<int>> adj(n,vector<int>(n,0));
    for(int i=0; i<m; i++) adj[u[i]][v[i]] = 1;
    ans[n-1]=r[n-1];
    for(int i=n-2; i>=0; i--)
        if (a[i]) {ans[i] = adj[i][i] && r[i] || adj[i][i+1] && ans[i+1];}
        else {ans[i] = (adj[i][i]==0 || r[i]) && (adj[i][i+1]==0 || ans[i+1]);}
    return ans;
}

vector<int> who_wins(vector<int> a, vector<int> r, vector<int> u, vector<int> v) {
	vector<int> res(a.size());

    int n = a.size(), m = u.size();
    vector<vector<int>> adj(n);

    for(int i=0; i<m; i++) adj[u[i]].push_back(v[i]);
    for(int i=0; i<n; i++) sort(adj[i].begin(),adj[i].end());

    if (isSubtask3(a)) return subtask3(a,r,u,v);
    // if (isSubtask2(n)) return subtask2(a,r,u,v);
    if (isSubtask1(u,v)) return subtask1(a,r,u,v);
    // for(int i=0; i<n; i++) {
    //     cout << i << ": ";
    //     for (const int elem: adj[i])
    //         cout << elem << " ";
    //     cout << endl;
    // }

	for(int i = 0; i < n; i++)
		res[i] = i % 2;
	return res;
}

Compilation message

train.cpp: In function 'bool isSubtask3(const std::vector<int>&)':
train.cpp:43:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |     for(int i=0; i<a.size(); i++)
      |                  ~^~~~~~~~~
train.cpp: In function 'bool dfs(int, int, std::vector<int>&, std::vector<int>&, std::vector<std::vector<int> >&, std::vector<int>&, std::vector<int>&)':
train.cpp:54:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |         for(int i=0; i<adjL[now].size(); i++)
      |                      ~^~~~~~~~~~~~~~~~~
train.cpp:59:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   59 |         for(i=0; i<adjL[now].size(); i++)
      |                  ~^~~~~~~~~~~~~~~~~
train.cpp:61:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   61 |         if (i==adjL[now].size()) ans[now] = 1;
      |             ~^~~~~~~~~~~~~~~~~~
train.cpp: In function 'void checkNeighbor(int, std::vector<int>&, std::vector<std::vector<int> >&, std::vector<int>&)':
train.cpp:69:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   69 |         for(int i=0; i<adjL[now].size(); i++)
      |                      ~^~~~~~~~~~~~~~~~~
train.cpp:74:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   74 |         for(i=0; i<adjL[now].size(); i++)
      |                  ~^~~~~~~~~~~~~~~~~
train.cpp:76:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   76 |         if (i==adjL[now].size()) ans[now] = 1;
      |             ~^~~~~~~~~~~~~~~~~~
train.cpp: In function 'bool dfs3(int, int, const std::vector<std::vector<int> >&, std::vector<int>&, std::vector<int>&)':
train.cpp:85:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   85 |     for(int i=0; i<adjL[now].size(); i++)
      |                  ~^~~~~~~~~~~~~~~~~
train.cpp: In function 'std::vector<int> subtask2(std::vector<int>&, std::vector<int>&, std::vector<int>&, std::vector<int>&)':
train.cpp:156:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  156 |                 for(j=0; j<adjL[i].size(); j++)
      |                          ~^~~~~~~~~~~~~~~
train.cpp:158:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  158 |                 if (j<adjL[i].size()) {ans[i] = 1;} // printf("ans[%d]=%d\n",i,ans[i]);}
      |                     ~^~~~~~~~~~~~~~~
train.cpp:161:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  161 |                 for(j=0; j<adjL[i].size(); j++)
      |                          ~^~~~~~~~~~~~~~~
train.cpp:163:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  163 |                 if (j==adjL[i].size()) {ans[i] = 1;} //  printf("ans[%d]=%d\n",i,ans[i]);}
      |                     ~^~~~~~~~~~~~~~~~
train.cpp: In function 'std::vector<int> subtask1(std::vector<int>&, std::vector<int>&, std::vector<int>&, std::vector<int>&)':
train.cpp:182:39: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  182 |         if (a[i]) {ans[i] = adj[i][i] && r[i] || adj[i][i+1] && ans[i+1];}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 40 ms 98948 KB Output is correct
2 Correct 40 ms 98924 KB Output is correct
3 Correct 41 ms 98900 KB Output is correct
4 Correct 40 ms 98928 KB Output is correct
5 Correct 40 ms 98888 KB Output is correct
6 Correct 41 ms 98896 KB Output is correct
7 Correct 42 ms 98896 KB Output is correct
8 Incorrect 43 ms 99408 KB 3rd lines differ - on the 5th token, expected: '1', found: '0'
9 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB 3rd lines differ - on the 3rd token, expected: '1', found: '0'
2 Halted 0 ms 0 KB -

Subtask #3
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 51 ms 100488 KB Output is correct
2 Correct 52 ms 100176 KB Output is correct
3 Correct 48 ms 100176 KB Output is correct
4 Correct 48 ms 100180 KB Output is correct
5 Correct 48 ms 99928 KB Output is correct
6 Incorrect 54 ms 100176 KB 3rd lines differ - on the 47th token, expected: '1', found: '0'
7 Halted 0 ms 0 KB -

Subtask #4
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 1116 KB 3rd lines differ - on the 1st token, expected: '1', found: '0'
2 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 1372 KB 3rd lines differ - on the 1st token, expected: '1', found: '0'
2 Halted 0 ms 0 KB -

Subtask #6
0 / 51.0

# Verdict Execution time Memory Grader output
1 Correct 40 ms 98948 KB Output is correct
2 Correct 40 ms 98924 KB Output is correct
3 Correct 41 ms 98900 KB Output is correct
4 Correct 40 ms 98928 KB Output is correct
5 Correct 40 ms 98888 KB Output is correct
6 Correct 41 ms 98896 KB Output is correct
7 Correct 42 ms 98896 KB Output is correct
8 Incorrect 43 ms 99408 KB 3rd lines differ - on the 5th token, expected: '1', found: '0'
9 Halted 0 ms 0 KB -