Submission #1144938

#	Time	Username	Problem	Language	Result	Execution time	Memory
1144938		KasymK	Trampoline (info1cup20_trampoline)	C++20	23 / 100	2092 ms	122696 KiB

trampoline

#include "bits/stdc++.h"
using namespace std;
#define ff first
#define ss second
#define all(v) v.begin(), v.end()
#define ll long long
#define pb push_back
#define pii pair<int, int>
#define pli pair<ll, int>
#define pll pair<ll, ll>
#define tr(i, c) for(auto i = c.begin(); i != c.end(); ++i)
#define wr puts("----------------")
template<class T>bool umin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool umax(T& a,T b){if(a<b){a=b;return 1;}return 0;}

int main(){
    int r, c, n;
    scanf("%d%d%d", &r, &c, &n);
    vector<vector<bool>> gr(r+1, vector<bool> (c+1, false)), vis(r+1, vector<bool> (c+1, false));
    auto is=[&](int a, int b) -> bool {
        return (a>=1 and a<=r and b>=1 and b<=c and !vis[a][b]);
    };
    while(n--){
        int a, b;
        scanf("%d%d", &a, &b);
        gr[a][b]=1;
    }
    int q;
    scanf("%d", &q);
    while(q--){
        vis.assign(r+1, vector<bool> (c+1, false));
        int x, y, x1, y1;
        scanf("%d%d%d%d", &x, &y, &x1, &y1);
        queue<pii> q;
        q.push({x, y});
        while(!q.empty()){
            if(vis[x1][y1])
                break;
            pii P=q.front();
            q.pop();
            if(gr[P.ff][P.ss]){
                if(is(P.ff+1, P.ss))
                    q.push({P.ff+1, P.ss}), vis[P.ff+1][P.ss]=1;
                if(is(P.ff, P.ss+1))
                    q.push({P.ff, P.ss+1}), vis[P.ff][P.ss+1]=1;
                continue;
            }
            if(is(P.ff, P.ss+1))
                q.push({P.ff, P.ss+1}), vis[P.ff][P.ss+1]=1;
        }
        puts(vis[x1][y1]?"Yes":"No");
    }
    return 0;
}

Compilation message (stderr)

trampoline.cpp: In function 'int main()':
trampoline.cpp:18:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |     scanf("%d%d%d", &r, &c, &n);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~
trampoline.cpp:25:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 |         scanf("%d%d", &a, &b);
      |         ~~~~~^~~~~~~~~~~~~~~~
trampoline.cpp:29:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |     scanf("%d", &q);
      |     ~~~~~^~~~~~~~~~
trampoline.cpp:33:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |         scanf("%d%d%d%d", &x, &y, &x1, &y1);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 23 / 23
• Subtask 2: 0 / 20
• Subtask 3: 0 / 11
• Subtask 4: 0 / 19
• Subtask 5: 0 / 27