Submission #1071873

#	Time	Username	Problem	Language	Result	Execution time	Memory
1071873		Rigobertus	Combo (IOI18_combo)	C++17	10 / 100	41 ms	1128 KiB

combo

#include <iostream>
#include <algorithm>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <string>
//#define int long long
#include "combo.h"
using namespace std;
string guess_sequence(int n) {    string c[4] = {"A", "B", "X", "Y"};    string s = "";    set<int> vis;    for (int i = 0; i < 4; i++) {        vis.insert(i);    }    int j;    for (int i = 0; i < 4; i++) {        if (i == 3 || press(c[i])) {            s = c[i];            j = i;            vis.erase(i);            break;        }    }    while (s.size() < n) {        int last = *vis.rbegin();        int k;        for (int i = 0; i < 4; i++) {            k = i;            if (!vis.count(i)) {                if (i != j) {                    vis.insert(i);                }                continue;            }            if (i == last) {                s += c[i];                break;            }            string p = s + c[i] + c[i];            int x = press(p);            if (x == p.size()) {                s = p;                break;            }            else if (x == p.size() - 1) {                s += c[i];                vis.erase(i);                break;            }        }        for (int i = k+1; i<4; i++) vis.insert(i);    }    return s;}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:11:360: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   11 | string guess_sequence(int n) {    string c[4] = {"A", "B", "X", "Y"};    string s = "";    set<int> vis;    for (int i = 0; i < 4; i++) {        vis.insert(i);    }    int j;    for (int i = 0; i < 4; i++) {        if (i == 3 || press(c[i])) {            s = c[i];            j = i;            vis.erase(i);            break;        }    }    while (s.size() < n) {        int last = *vis.rbegin();        int k;        for (int i = 0; i < 4; i++) {            k = i;            if (!vis.count(i)) {                if (i != j) {                    vis.insert(i);                }                continue;            }            if (i == last) {                s += c[i];                break;            }            string p = s + c[i] + c[i];            int x = press(p);            if (x == p.size()) {                s = p;                break;            }            else if (x == p.size() - 1) {                s += c[i];                vis.erase(i);                break;            }        }        for (int i = k+1; i<4; i++) vis.insert(i);    }    return s;}
      |                                                                                                                                                                                                                                                                                                                                                               ~~~~~~~~~^~~
combo.cpp:11:793: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 | string guess_sequence(int n) {    string c[4] = {"A", "B", "X", "Y"};    string s = "";    set<int> vis;    for (int i = 0; i < 4; i++) {        vis.insert(i);    }    int j;    for (int i = 0; i < 4; i++) {        if (i == 3 || press(c[i])) {            s = c[i];            j = i;            vis.erase(i);            break;        }    }    while (s.size() < n) {        int last = *vis.rbegin();        int k;        for (int i = 0; i < 4; i++) {            k = i;            if (!vis.count(i)) {                if (i != j) {                    vis.insert(i);                }                continue;            }            if (i == last) {                s += c[i];                break;            }            string p = s + c[i] + c[i];            int x = press(p);            if (x == p.size()) {                s = p;                break;            }            else if (x == p.size() - 1) {                s += c[i];                vis.erase(i);                break;            }        }        for (int i = k+1; i<4; i++) vis.insert(i);    }    return s;}
      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       ~~^~~~~~~~~~~
combo.cpp:11:887: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 | string guess_sequence(int n) {    string c[4] = {"A", "B", "X", "Y"};    string s = "";    set<int> vis;    for (int i = 0; i < 4; i++) {        vis.insert(i);    }    int j;    for (int i = 0; i < 4; i++) {        if (i == 3 || press(c[i])) {            s = c[i];            j = i;            vis.erase(i);            break;        }    }    while (s.size() < n) {        int last = *vis.rbegin();        int k;        for (int i = 0; i < 4; i++) {            k = i;            if (!vis.count(i)) {                if (i != j) {                    vis.insert(i);                }                continue;            }            if (i == last) {                s += c[i];                break;            }            string p = s + c[i] + c[i];            int x = press(p);            if (x == p.size()) {                s = p;                break;            }            else if (x == p.size() - 1) {                s += c[i];                vis.erase(i);                break;            }        }        for (int i = k+1; i<4; i++) vis.insert(i);    }    return s;}
      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     ~~^~~~~~~~~~~~~~~
combo.cpp:11:516: warning: 'j' may be used uninitialized in this function [-Wmaybe-uninitialized]
   11 | string guess_sequence(int n) {    string c[4] = {"A", "B", "X", "Y"};    string s = "";    set<int> vis;    for (int i = 0; i < 4; i++) {        vis.insert(i);    }    int j;    for (int i = 0; i < 4; i++) {        if (i == 3 || press(c[i])) {            s = c[i];            j = i;            vis.erase(i);            break;        }    }    while (s.size() < n) {        int last = *vis.rbegin();        int k;        for (int i = 0; i < 4; i++) {            k = i;            if (!vis.count(i)) {                if (i != j) {                    vis.insert(i);                }                continue;            }            if (i == last) {                s += c[i];                break;            }            string p = s + c[i] + c[i];            int x = press(p);            if (x == p.size()) {                s = p;                break;            }            else if (x == p.size() - 1) {                s += c[i];                vis.erase(i);                break;            }        }        for (int i = k+1; i<4; i++) vis.insert(i);    }    return s;}
      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    ^~

• Subtask 1: 5 / 5
• Subtask 2: 5 / 95