Submission #34587

#	Time	Username	Problem	Language	Result	Execution time	Memory
34587		sinhriv	Sterilizing Spray (JOI15_sterilizing)	C++14	100 / 100	299 ms	12216 KiB

sterilizing

#include <bits/stdc++.h>

using namespace std;

const int N = 1e5 + 10;

int n, K, m;
long long pw[N];

struct SegmentTree{
	int mx[N << 3];
	long long sum[N << 3];

	#define mid ((l + r) >> 1)

	void modify(int x, int l, int r, int u, int val){
		if(l > u || r < u) return;
		if(l == r){
			sum[x] = mx[x] = val;
			return;
		}
		modify(x + x, l, mid, u, val);
		modify(x + x + 1, mid + 1, r, u, val);

		sum[x] = sum[x + x] + sum[x + x + 1];
		mx[x] = max(mx[x + x], mx[x + x + 1]);
	}

	void update(int x, int l, int r, int u, int v){
		if(l > v || r < u || mx[x] == 0) return;
		if(l == r){
			sum[x] /= K;
			mx[x] /= K;
			return;
		}
		update(x + x, l, mid, u, v);
		update(x + x + 1, mid + 1, r, u, v);
		sum[x] = sum[x + x] + sum[x + x + 1];
		mx[x] = max(mx[x + x], mx[x + x + 1]);
	}

	long long query(int x, int l, int r, int u, int v){
		if(l > v || r < u) return 0;
		if(l >= u && r <= v) return sum[x];	
		return query(x + x, l, mid, u, v) + query(x + x + 1, mid + 1, r, u, v);
	}
}Smt;

int main(){
	if(fopen("1.inp", "r")){
		freopen("1.inp", "r", stdin);
	}

	scanf("%d%d%d", &n, &m, &K);


	pw[0] = 1;
	for(int i = 1; i <= m; ++i){
		if(1e18 / pw[i - 1] < K) pw[i] = 1e18;
		else pw[i] = pw[i - 1] * K;
	}


	for(int i = 1; i <= n; ++i){
		int x;
		scanf("%d", &x);
		Smt.modify(1, 1, n, i, x);
	}


	while(m--){
		int t, u, v;
		scanf("%d%d%d", &t, &u, &v);


		if(t == 1){
			Smt.modify(1, 1, n, u, v);
		}
		if(t == 2 && K > 1){
			Smt.update(1, 1, n, u, v);
		}


		if(t == 3){
			printf("%lld\n", Smt.query(1, 1, n, u, v));
		}
	}

	return 0;
}

Compilation message (stderr)

sterilizing.cpp: In function 'int main()':
sterilizing.cpp:51:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   freopen("1.inp", "r", stdin);
                               ^
sterilizing.cpp:54:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d", &n, &m, &K);
                             ^
sterilizing.cpp:66:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &x);
                  ^
sterilizing.cpp:73:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d", &t, &u, &v);
                              ^

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 75 / 75