大家好,我被简单题卡常了!
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大家好,我被简单题卡常了!
852144
Loser_Syx楼主2023/12/25 22:29

最后一个点过不去

#include <ctime>
#include <iostream>
#include <cassert>
#include <queue>
#include <cmath>
#include <cstring>
#include <algorithm>
#include <bitset>
using namespace std;
#define debug puts("qwq")
#define open(x) freopen(#x".in", "r", stdin);freopen(#x".out", "w", stdout);
#define close fclose(stdin);fclose(stdout);
#define all(x) x.begin(), x.end()
namespace FastIO {
	template <typename T = int>
	inline T read() {
		T s = 0, w = 1;
		char c = getchar();
		while (!isdigit(c)) {
			if (c == '-') w = -1;
			c = getchar();
		}
		while (isdigit(c)) s = (s << 1) + (s << 3) + (c ^ 48), c = getchar();
		return s * w;
	}
	template <typename T>
	inline void read(T &s) {
		s = 0;
		int w = 1;
		char c = getchar();
		while (!isdigit(c)) {
			if (c == '-') w = -1;
			c = getchar();
		}
		while (isdigit(c)) s = (s << 1) + (s << 3) + (c ^ 48), c = getchar();
		s = s * w;
	}
	template <typename T, typename... Args> inline void read(T &x, Args &...args) {
		read(x), read(args...);
	}
	template <typename T>
	inline void write(T x, char ch) {
		if (x < 0) x = -x, putchar('-');
		static char stk[25];
		int top = 0;
		do {
			stk[top++] = x % 10 + '0', x /= 10;
		} while (x);
		while (top) putchar(stk[--top]);
		putchar(ch);
		return;
	}
	void quit() {
		exit(0);
	}
} using namespace FastIO;
const int mod = 1e9 + 7;
int ksm(int a, int b, int p) {
	int res = 1;
	while (b) {
		if (b & 1) res = 1LL * res * a % p;
		b >>= 1;
		a = 1LL * a * a % p;
	}
	return res;
}
int sum[1000011], power[1000011];
vector<int> idx[1000011], idy[1000011];
struct node {
	int x, y, val; 
} a[1000011];
bitset<1000011> in;
signed main() {
	int n, m; read(n, m);
	int v = 10000;
	for (int i = 1; i <= n; ++i) {
		read(a[i].x, a[i].y, a[i].val);
		idx[a[i].x].emplace_back(i);
	}
	for (int i = 1; i <= n; ++i) {
		if (idx[i].size() >= v) in[i] = 1;
		power[i] = 1;
	}
	for (int i = 1; i <= n; ++i) {
		if (in[a[i].x] == 0) sum[a[i].y] =(sum[a[i].y] + a[i].val) % mod;
		else idy[a[i].y].emplace_back(i);
	}
	while (m--) {
		int opt, x, y;
		read(opt);
		if (opt == 1) {
			read(x);
			if (in[x] == 1) {
				(power[x] <<= 1) %= (mod-1);
			} else {
				for (const auto i : idx[x]) {
					sum[a[i].y] -= a[i].val;
					a[i].val = a[i].val * 1LL * a[i].val % mod;
					sum[a[i].y] = (a[i].val + sum[a[i].y]) % mod;
					if (sum[a[i].y] < 0) sum[a[i].y] += mod;
				}
			}
		} else {
			read(y);
			int ans = sum[y];
			for (const auto i : idy[y]) {
				ans = (ans + ksm(a[i].val, power[a[i].x], mod)) % mod;
			}
			write(ans, '\n');
		}
	}
	return 0;
}
2023/12/25 22:29
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