Submission #298000

#	Time	Username	Problem	Language	Result	Execution time	Memory
298000		naderjemel	Cop and Robber (BOI14_coprobber)	C++14	Compilation error	0 ms	0 KiB

coprobber

#include "coprobber.h"
#include <vector>
#include <set>
using namespace std;

vector<set<int>> kid;
vector<vector<int>> adj;
vector<int> path;
int n,p,par,old=-1;
void calc(int u, int p){
    path.push_back(u);
    for(auto v:adj[u]){
        if(v==p) continue;
        calc(v,u);
    }
    path.pop_back();
    for(auto i:path){
        kid[i].insert(u);
    }
}
int solve(int u, int p, int r) {
    for (auto v:adj[u]) {
        if (v == p) continue;
        printf("fun: %d %d\n",p,r);
        if (v == r) return r;
        if (kid[v].find(r) != kid[v].end()) return v;
    }
}
int start(int N, bool A[MAX_N][MAX_N]){
    n=N;
    kid.resize(N+2,set<int>());
    adj.resize(N+2,vector<int>());
    for(int i=0;i<n;i++){
        for(int j=0;j<n;j++){
            if(A[i][j]){
                adj[i].push_back(j);
                adj[j].push_back(i);
            }
        }
    }
    calc(0,-1);
    return p=0;
}

int nextMove(int R)
{
    printf("%d\n",p);
    par = old;
    old = p;
    p = solve(p,par,R);
    printf("%d %d\n",p,R);
    return p;
}

Compilation message (stderr)

coprobber.cpp: In function 'int solve(int, int, int)':
coprobber.cpp:24:9: error: 'printf' was not declared in this scope
   24 |         printf("fun: %d %d\n",p,r);
      |         ^~~~~~
coprobber.cpp:4:1: note: 'printf' is defined in header '<cstdio>'; did you forget to '#include <cstdio>'?
    3 | #include <set>
  +++ |+#include <cstdio>
    4 | using namespace std;
coprobber.cpp: In function 'int nextMove(int)':
coprobber.cpp:47:5: error: 'printf' was not declared in this scope
   47 |     printf("%d\n",p);
      |     ^~~~~~
coprobber.cpp:47:5: note: 'printf' is defined in header '<cstdio>'; did you forget to '#include <cstdio>'?
coprobber.cpp: In function 'int solve(int, int, int)':
coprobber.cpp:28:1: warning: control reaches end of non-void function [-Wreturn-type]
   28 | }
      | ^