mirror of
https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
78 lines
1.8 KiB
C++
78 lines
1.8 KiB
C++
#include <iostream>
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#include <cstdio>
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#include <cstring>
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#include <algorithm>
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using namespace std;
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struct Page
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{
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int l,r;
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};
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bool cmp(Page a,Page b)
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{
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if(a.l == b.l)return a.r < b.r;
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return a.l < b.l;
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}
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int main()
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{
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int n;
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while(scanf("%d", &n), n)
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{
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char str[1005]= {0},word[1005]= {0};
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Page p[1005];
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getchar();
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gets(str);
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int L=strlen(str);
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int pos=0,nn=0;
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for(int i=0; i<L; ++i)
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{
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if(str[i]==','||i==L-1)
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{
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if(i==L-1) word[pos++]=str[i];
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int l=strlen(word);
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int a=0,b=0;
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bool pp=false;
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for(int j=0; j<l; ++j)
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{
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if(!pp&&word[j]!='-')
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a=a*10+word[j]-'0';
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if(word[j]=='-')
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pp=true;
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else if(pp==true)
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b=b*10+word[j]-'0';
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}
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if(b==0) b=a;
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if(b>n) b=n;
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if(a<=b)
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{
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p[nn].l=a;
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p[nn].r=b;
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nn++;
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}
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memset(word,0,sizeof(word));
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pos=0;
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}
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else
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word[pos++]=str[i];
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}
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sort(p,p+nn,cmp);
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int mx=p[0].r,ans=0;
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if(nn) ans+=p[0].r-p[0].l+1;
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for(int i=1;i<nn;++i)
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{
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if(p[i].r<=mx) continue;
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if(p[i].l>mx)
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{
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ans+=p[i].r-p[i].l+1;
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mx=p[i].r;
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}
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else if(p[i].r>mx)
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{
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ans+=p[i].r-mx;
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mx=p[i].r;
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}
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}
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printf("%d\n",ans);
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}
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return 0;
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}
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