提出 #577442

---

ソースコード 拡げる

#include <bits/stdc++.h>
using namespace std;

int n;
char s[100010]={};
int lst[100010]={}, nxt[100010]={};
int ll[100010], sl = 0;
int nl[100010], sn = 0;

int lst2[100010]={}, nxt2[100010]={};

int main() {
	scanf("%d%s", &n, s + 1);
	for(int i = 1; i <= n; ++i) {
		lst[i] = lst[i-1] + (s[i] == '>');
		lst2[i] = lst2[i-1] + (s[i] == '<');
		if(s[i] == '<') ll[sl++] = i;
	}

	for(int i = n; i >= 1; --i) {
		nxt[i] = nxt[i+1] + (s[i] == '<');
		nxt2[i] = nxt2[i+1] + (s[i] == '>');
		if(s[i] == '>') nl[sn++] = i;
	}

	int ans = 0, tmp;
	for(int i = 1; i <= n; ++i) {
		if(s[i] == '>') {
			if(lst[i] <= nxt[i]) {
				tmp = ll[lst2[i] + lst[i] - 1];
			}
			else {
				tmp = n - nl[nxt2[i] + nxt[i] - 1] + 1;
			}
		}
		else {
			if(lst[i] < nxt[i]) {
				tmp = ll[lst2[i] + lst[i] - 1];
			}
			else {
				tmp = n - nl[nxt2[i] + nxt[i] - 1] + 1;
			}
		}
		// printf("ans %d = %d, %c %d %d\n", i, tmp, s[i], lst[i], nxt[i]);
		ans = max(ans, tmp);
	}
	printf("%d\n", ans);


	return 0;
}

提出情報

コンパイルエラー

./Main.cpp: In function ‘int main()’:
./Main.cpp:13:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%s", &n, s + 1);
                          ^

ジャッジ結果