[CF1167D]Bicolored RBS题解

Posted 2021-12-01 linzhengmin

模拟两个颜色的扩号层数，贪心，如果是左括号，哪边的层数浅就放那边；如果是右括号，哪边的层数深就放那边。
至于层数的维护，两个int就做掉了

放个代码：

#include <cstdio>
#include <iostream>
#include <string>

using namespace std;

inline int read(){
    int x = 0; int zf = 1; char ch = ' ';
    while (ch != '-' && (ch < '0' || ch > '9')) ch = getchar();
    if (ch == '-') zf = -1, ch = getchar();
    while (ch >= '0' && ch <= '9') x = x * 10 + ch - '0', ch = getchar(); return x * zf;
}

int rd = 0;
int bl = 0;
int ans[200005];

int main(){
    int n = read();
    string s; cin >> s;
    for (int i = 0; i < n; ++i){
        if (s[i] == ')')
            (rd > bl) ? (--rd, ans[i] = 0) : (--bl, ans[i] = 1);
        else if (s[i] == '(')
            (rd < bl) ? (++rd, ans[i] = 0) : (++bl, ans[i] = 1);
    }
    for (int i = 0; i < n; ++i)
        printf("%d", ans[i]);
    return 0;
}