Submission #1178688

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Source Code Expand

#include <cstdio>
#include <cstdlib>
#include <algorithm>
#include <cmath>
#define file(s) freopen(s".in", "r", stdin), freopen(s".out", "w", stdout);
using namespace std;
const int MAXN = 1000005;
int n, s[MAXN], Q;
int ne[MAXN][27], ST[MAXN][19];

void get_str() {
    char ch = getchar();
    while (ch < 'a' && ch > 'z')
        ch = getchar();
    while (ch >= 'a' && ch <= 'z')
        s[++n] = ch - 'a', ch = getchar();
}

int main() {
    get_str();
    for (int i = n; i; i--) {
        ne[i][s[i]] = i + 1;
        for (int j = s[i] + 1; j <= 26; j++)
            ne[i][j] = ne[ne[i][j - 1]][j - 1];
        for (int j = 0; j < s[i]; j++)
            ne[i][j] = ne[ne[i][26]][j];
        ST[i][0] = ne[i][26];
    }
    for (int j = 1; j <= 18; j++)
        for (int i = 1; i <= n; i++)
            ST[i][j] = ST[ST[i][j - 1]][j - 1];
    scanf("%d", &Q);
    for (int t = 1, l, r; t <= Q; t++) {
        scanf("%d %d", &l, &r);
        for (int i = 18; ~i; i--)
            if (ST[l][i] <= r + 1 && ST[l][i])
                l = ST[l][i];
        printf(l == r + 1 ? "Yes\n" : "No\n");
    }
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:32:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &Q);
                    ^
./Main.cpp:34:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d", &l, &r);
                               ^

Judge Result