제출 #138933

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
138933		thebes	Lightning Rod (NOI18_lightningrod)	C++14	66 / 100	2041 ms	175676 KiB

Main

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

stack<pair<int,int>> mono;
int n, i, x, y, f;

int main(){
    for(scanf("%d",&n),i=1;i<=n;i++){
        scanf("%d%d",&x,&y); f=0;
        while(mono.size()){
            if(x-mono.top().first<=mono.top().second-y) break;
            else if(y-mono.top().second>=x-mono.top().first) mono.pop();
            else{f=1; break;}
        }
        if(mono.empty()||f) mono.push({x,y});
    }
    printf("%d\n",mono.size());
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

lightningrod.cpp: In function 'int main()':
lightningrod.cpp:17:30: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::stack<std::pair<int, int> >::size_type {aka long unsigned int}' [-Wformat=]
     printf("%d\n",mono.size());
                   ~~~~~~~~~~~^
lightningrod.cpp:8:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(scanf("%d",&n),i=1;i<=n;i++){
         ~~~~~~~~~~~~~~^~~~
lightningrod.cpp:9:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d",&x,&y); f=0;
         ~~~~~^~~~~~~~~~~~~~

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