Language: C++

#include<iostream>
#include<string>

void solve_A() {
	int S, W;
	std::cin >> S >> W;
	//std::string result = (S <= W ? "unsafe" : "safe");
	std::cout << (S <= W ? "unsafe" : "safe") << std::endl;
}

void solve_B() {
	int A, B, C, D;
	std::cin >> A >> B >> C >> D;
	while (!( A <= 0 || C <= 0)) {
		C -= B;
		if (C <= 0) break;
		A -= D;
	}
	std::cout << (A <= 0 ? "No" : "Yes") << std::endl;
}

#include<vector>
#include<algorithm>

void solve_C() {
	int N;
	std::vector<std::string> v;
	std::cin >> N;
	for (int i = 0; i < N; i++) {
		std::string tmp;
		std::cin >> tmp;
		v.push_back(tmp);
	}
	std::sort(v.begin(), v.end());
	auto last = std::unique(v.begin(), v.end());
	v.erase(last, v.end());
	std::cout << v.size() << std::endl;

}

#include<set>

void solve_C2() {
	int N;
	std::set<std::string> st;
	std::cin >> N;
	for (int i = 0; i < N; i++) {
		std::string s;
		std::cin >> s;
		st.insert(s);
	}
	std::cout << st.size() << std::endl;
}

void solve_D() {//TLE
	std::string S;
	std::cin >> S;
	int N = S.length();
	int ans = 0;
	for (int i = 0; i < N-3; i++) {
		for (int j = i+3; j < N; j++) {
			int num = atoi(S.substr(i, j - i+1).c_str());
			if (num % 2019 == 0) {
				ans++;
			}
		}
	}
	std::cout << ans << std::endl;
}

void solve_D2() {//類題158E
	std::string s;
	std::cin >> s;
	int n = s.size();
	std::reverse(s.begin(), s.end());
	int x = 1, ans = 0, total = 0;//累積和
	const int m = 2019;
	std::vector<int> cnt(m);
	for (int i = 0; i < n; i++) {
		cnt[total]++;
		total += atoi(s.substr(i, 1).c_str()) * x; //N桁までの値 = N桁目の値 * 10^N + N-1桁目の値
		total %= m; //N桁までの値のmod = (N桁 + (N-1~1)桁目のmod) mod 2019
		ans += cnt[total];//計算したN桁の累積和のmodの値が1~N-1桁までで計算したmodと一致する場合、区間の数値のmodが0と同値
		//modが一致する個数の部分数列を新たに作成できるので、cnt配列の要素分足し合わせる
		x = x * 10 % m;
	}
	std::cout << ans << std::endl;
}

void solve_D3() {
	std::string s;
	std::cin >> s;
	int n = s.length();
	const int N = 200000;
	std::reverse(s.begin(), s.end());
	long long int x = 1, ans = 0;
	long long int total[N];//累積和
	total[0] = 0;
	const int m = 2019;
	std::vector<int> cnt(m);
	for (int i = 1; i <= n; i++) {
		total[i] = total[i-1] + atoi(s.substr(i, 1).c_str()) * x;
		x = x * 10;
		for (int j = 1; j < i-3; j++) {
			if ((total[i] - total[j])%2019 ==0) {
				ans++;
			}
		}
	}
	std::cout << ans << std::endl;
}

#include<queue>
const int MAX_V = 50;
const int MAX_S = MAX_V * 50 + 50;
const long long INF = 1e18;

struct Edge {
	int to, a, b;
	Edge(int to, int a, int b) :to(to), a(a), b(b) {}//コンストラクタ
};

struct Data {
	int v, s;//頂点、所持金
	long long x;//所要時間
	Data(int v, int s, long long x) :v(v), s(s), x(x) {}
	bool operator<(const Data& a) const { return x > a.x; }//最小ヒープにする
};

std::vector<Edge> g[MAX_V];//隣接リスト
long long dp[MAX_V][MAX_S];

void solve_E() {
	int n, m, s;
	std::cin >> n >> m >> s;
	for (int i = 0; i<m; i++) {
		int u, v, a, b;
		std::cin >> u >> v >> a >> b;
		u--; v--;
		g[u].emplace_back(v, a, b);
		g[v].emplace_back(u, a, b);
	}
	std::vector<int> c(n), d(n);
	for (int i = 0; i < n; i++) {
		std::cin >> c[i] >> d[i];
	}
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < MAX_S; j++) {
			dp[i][j] = INF;
		}
	}
	s = std::min(s, MAX_S);//?

	std::priority_queue<Data> q;
	auto push = [&]/*ラムダキャプチャ*/(int v, int s, long long x) {//ある地点にある所持金である時間で到達できる
		if (s < 0) return;
		if (dp[v][s] <= x) return;
		dp[v][s] = x;
		q.emplace(v, s, x);
	};
	push(0, s, 0);
	while (!q.empty()) {
		Data data = q.top(); q.pop();
		int v = data.v, s = data.s;
		long long x = data.x;
		if (dp[v][s] != x) continue;
		{
			int ns = std::min(s + c[v], MAX_S);
			push(v, ns, x + d[v]);
		}
		for (Edge e: g[v]) {
			push(e.to, s - e.a, x + e.b);
		}
	}
	for (int i = 1; i < n; i++) {
		long long ans = INF;
		for (int j = 1; j < MAX_S; j++) {
			ans = std::min(ans, dp[i][j]);
		}
		std::cout << ans << std::endl;
	}

}

Compiler output:
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status