Submission #2094123

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Source Code Expand

#include<stdio.h>
#include<vector>
#include<algorithm>
#include<string>
#include<iostream>
using namespace std;
int dp[505050][27];
int nxt[20][505050];
int main()
{
	string s;
	cin >> s;
	for (int i = 0; i < 27; i++)dp[s.size()][i] = dp[s.size() + 1][i] = s.size() + 1;
	for (int i = s.size() - 1; i >= 0; i--)
	{
		dp[i][s[i] - 'a'] = i + 1;
		for (char z = s[i] + 1; z <= 'z' + 1; z++)dp[i][z - 'a'] = dp[dp[i][z - 'a' - 1]][z - 'a' - 1];
		for (char z = 'a'; z < s[i]; z++)dp[i][z - 'a'] = dp[dp[i][26]][z - 'a'];
		nxt[0][i] = dp[i][26];
	}
	nxt[0][s.size()] = nxt[0][s.size() + 1] = s.size() + 1;
	for (int i = 1; i < 20; i++)for (int j = 0; j <= s.size() + 1; j++)nxt[i][j] = nxt[i - 1][nxt[i - 1][j]];
	int query;
	scanf("%d", &query);
	for (int p = 0; p < query; p++)
	{
		int za, zb;
		scanf("%d%d", &za, &zb);
		za--;
		for (int i = 19; i >= 0; i--)if (nxt[i][za] <= zb)za = nxt[i][za];
		printf((za == zb) ? "Yes\n" : "No\n");
	}
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:24:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &query);
                     ^
./Main.cpp:28:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &za, &zb);
                          ^

Judge Result