提出 #19795997

---

ソースコード 拡げる

#include "bits/stdc++.h"
using namespace std; 

#ifdef LOCAL
    #include "debug.h"
    #define input freopen("input.txt", "r", stdin); freopen("output.txt", "w", stdout);
#else
    #define debug(...) 4
    #define input 4
#endif

using ll = long long;
//const int mod = 998244353;
const int mod = 1e9 + 7;
const int N = 2e5 + 5;
vector<pair<int, int>> v, p;
int ans = 0;
void solve(int idx, vector<int> &taken) {
    if(idx == p.size()) {
        map<int, int> f;
        int cnt = 0;
        for(int x : taken)
            f[x] = 1;
        for(int i = 0; i < v.size(); i++) {
            if(f.count(v[i].first) and f.count(v[i].second))
                cnt++;
        }
        ans = max(ans, cnt);
        return;
    }
    taken.push_back(p[idx].first);
    solve(idx + 1, taken);
    taken.pop_back();
    taken.push_back(p[idx].second);
    solve(idx + 1, taken);
    taken.pop_back();
}
signed main() {
    input;
    cin.tie(nullptr) -> sync_with_stdio(false);
    int t = 1;
    // cin >> t;
    while(t--) {
        int n, m;
        cin >> n >> m;
        for(int i = 0; i < m; i++) {
            int x, y;
            cin >> x >> y;
            v.push_back({x, y});
        }
        int k;
        cin >> k;
        for(int i = 0; i < k; i++) {
            int x, y;
            cin >> x >> y;
            p.push_back({x, y});
        }
        vector<int> taken;
        solve(0, taken);
        cout << ans << "\n";

    }
}

提出情報

コンパイルエラー

./Main.cpp: In function ‘void solve(int, std::vector<int>&)’:
./Main.cpp:19:12: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::vector<std::pair<int, int> >::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
   19 |     if(idx == p.size()) {
      |        ~~~~^~~~~~~~~~~
./Main.cpp:24:26: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::vector<std::pair<int, int> >::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
   24 |         for(int i = 0; i < v.size(); i++) {
      |                        ~~^~~~~~~~~~
./Main.cpp: In function ‘int main()’:
./Main.cpp:9:19: warning: statement has no effect [-Wunused-value]
    9 |     #define input 4
      |                   ^
./Main.cpp:39:5: note: in expansion of macro ‘input’
   39 |     input;
      |     ^~~~~

ジャッジ結果