Submission #26359

#	Time	Username	Problem	Language	Result	Execution time	Memory
26359		tlwpdus	Ili (COI17_ili)	C++98	0 / 100	0 ms	2136 KiB

ili

#include <bits/stdc++.h>

using namespace std;

int n, m;
char str[20100];
char ttr[20100];
int son[10100][2];

int getn(char str[]) {
    int i, x = 0;
    for (i=0;str[i]>='0'&&str[i]<='9';i++) {
        x *=10;
        x+=str[i]-'0';
    }
    return x;
}

bool can0(int idx) {
    int i;
    for (i=0;i<n+m;i++) ttr[i] = str[i];
    ttr[idx] = '0';
    for (i=idx;i>=n;i--) {
        if (ttr[i]=='0') {
            if (ttr[son[i][0]]=='1'||ttr[son[i][1]]=='1') return false;
            ttr[son[i][1]]=ttr[son[i][0]]='0';
        }
    }
    for (i=n;i<n+m;i++) {
        if (ttr[i]=='?') {
            if (ttr[son[i][0]]=='0'&&ttr[son[i][1]]=='0') ttr[i]='0';
            else ttr[i]='1';
        }
        if (ttr[i]=='1'&&ttr[son[i][0]]=='0'&&ttr[son[i][1]]=='0') return false;
        if (ttr[i]=='0'&&(ttr[son[i][0]]=='1'||ttr[son[i][1]]=='1')) return false;
    }
    return true;
}

int main() {
    int i, j;

    //freopen("input","r",stdin);

    scanf("%d%d",&n,&m);
    scanf("%s",str+n);
    fill(str,str+n,'?');
    for (i=0;i<m;i++) {
        char buf[10];
        for (j=0;j<2;j++) {
            int x = 0;
            scanf("%s",buf);
            if (buf[0]=='c') x+= n;
            x+=getn(buf+1)-1;
            son[i+n][j] = x;
        }
    }
    for (i=n+m-1;i>=n;i--) {
        if (str[i]=='0') {
            str[son[i][1]]=str[son[i][0]]='0';
        }
    }
    for (i=n;i<n+m;i++) {
        if (str[i]=='?') {
            if (!can0(i)) str[i] = '1';
        }
    }
    printf("%s\n",str+n);

    return 0;
}

Compilation message (stderr)

ili.cpp: In function 'int main()':
ili.cpp:45:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&m);
                        ^
ili.cpp:46:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%s",str+n);
                      ^
ili.cpp:52:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%s",buf);
                            ^

• Subtask 1: 0 / 7
• Subtask 2: 0 / 42
• Subtask 3: 0 / 51